Fort Pitt Bridge

Pittsburgh has the Three Sisters Bridges with the 6th, 7th, and 9th Street bridges, but I think it should also have the Twin Brothers Bridges with the Fort Pitt and Fort Duquesne (see post) bridges.  The two Fort bridges look very much alike as I think my featured images for the bridges show.  The roadway connecting them across the Point further suggests a close relationship between the bridges as do the names themselves.

To be honest, I had not been looking forward to my walk across the Fort Pitt Bridge.  It carries a freeway and the southern end connects to a highway and dirt.  Last spring I was at a conference at a downtown hotel and overheard a hotel employee giving directions to some out-of-town visitors to the Duquesne Incline, which involved crossing the Fort Pitt Bridge and walking along West Carson Street.  I couldn’t believe what I was hearing.  I didn’t understand why anyone would send a tourist along that route, as you always want to show tourists the best side of a city.  If the tourists had asked me, I would have sent them across the Smithfield Street Bridge and up the Monongahela Incline.  Then I would have recommended they walk along Grandview Avenue to the observation platform by the Duquesne Incline as it provides a more iconic view of the city.

After walking the route across the Fort Pitt Bridge to the Duquesne Incline myself, I don’t feel so bad about tourists being sent on it.  It wasn’t that bad of a walk and the view from the top is one of the best in the city.

I’ve probably made it quite clear by now that I really don’t like the fenced in bridges.  (See for instance thee Busway Bridges posts for Shadyside, East Liberty, and Millvale Avenue.)  The Fort Pitt Bridge sidewalk is wide and open, though the traffic is a little loud and it might have been hard to hear if I had wanted to have a conversation with a walking buddy.  The worst part was the stretch pictured above alongside the Fort Pitt Museum.

I enjoyed the views from the bridge as I never see the city from this angle.  It certainly does not present the most exciting view of the downtown buildings, but that was one of my goals with this project—to see all the views of downtown.

While crossing the bridge, I realized that I never spend any time on the Monongahela side of the Point.  I’m not sure why, but I always end up on the Allegheny side (or at the tip of the Point before it was under construction) when I come to the park.  This made me realize I really need to explore Point State Park more as the Monongahela side looks quite pleasant.

Renaming Bridges

There is a proposal to rename at least one of Pittsburgh’s bridges.  Apparently, Allegheny County has been considering renaming its bridges for at least the last year.  According to a July 25th article in the Post-Gazette, the county council’s public works committee passed a motion to rename the 16th Street Bridge after the historian David McCullough, who is from Pittsburgh.  I must not have read the paper that day as I’m sure the headline would have grabbed my attention: “Allegheny County May Rename the 16th Street Bridge for McCullough.”

The first that I became aware of this proposal was Wednesday this week (Aug. 22nd) when another article announced that the whole county council voted on the proposal and passed it.  This article does not commit to which bridge will be renamed.  Though it later says that the 16th Street bridge is the most likely, it starts by saying “a major span” may be named after McCullough.  This really got me interested.  As I’ve discovered from walking and writing about Pittsburgh’s bridges, many of the bridges already have alternative names that honor someone.  I believe that most people in Pittsburgh are aware that the Three Sisters Bridges have alternative names, but I don’t think people are as aware that the 40th Street Bridge also has an alternative name.  So, I wondered, which “major spans” in Pittsburgh are left to be renamed?

I believe that “major spans” probably translates to bridges over the three rivers.  Here follows a list of the bridges spanning the rivers and any alternative names they have.

On the Allegheny River:

Fort Duquesne Bridge-The Bridge to Nowhere (see post)

6th Street Bridge-Roberto Clemente Bridge (see post)

7th Street Bridge-Andy Warhol Bridge (see post)

9th Street Bridge-Rachel Carson Bridge (see post)

Fort Wayne Railroad Bridge

Veteran’s Bridge (see post)

16th Street Bridge (see post)

31st Street Bridge (see post)

33rd Street Railroad Bridge-B&O Railroad Bridge

40th Street Bridge-Washington’s Crossing Bridge (see post)

62nd Street Bridge-R. D. Fleming Bridge (see post)

Highland Park Bridge (see post)

Brilliant Branch Railroad Bridge

On the Monongahela River:

Fort Pitt Bridge-Parkway West (see post)

Smithfield Street Bridge (see post)

Monongahela Bridge-Panhandle Bridge (railroad)

Liberty Bridge-South Hills Bridge

(South) 10th Street Bridge (see post)

Birmingham Bridge (see post and post)

Monongahela Connecting Railroad Bridge (see post)

Hot Metal Bridge (see post)

Glenwood Bridge (see post)

Bridge Number 73-Glenwood Bridge: B&O Railroad

Homestead Grays Bridge-Homestead High Level Bridge (see post)

On the Ohio River:

West End Bridge-West End/North Side Bridge

Ohio Connecting Railroad Bridge

McKees Rocks Bridge

The 16th, 31st, and 10th Street Bridges are the most likely candidates for being renamed.  Other bridges like the Highland Park Bridge and the West End Bridge could be renamed to honor someone or something.  Some bridges with only one name such as the Hot Metal and Veteran’s bridges already honor or refer to something historical and it would be a shame to replace with a new name.  (Of course not all of these bridges are within the county’s jurisdiction.)

While I am talking about bridge names, I realize I should have had a discussion about the name of the Birmingham Bridge when I posted about that bridge as its name is somewhat significant.  Pittsburgh’s South Side, before it was annexed to the city, was the village of Birmingham.  So this is another bridge that should not be renamed as this tidbit of history could then be easier to lose.

The Aug. 22nd article in the paper said that there is an unofficial suggestion that a bridge should be renamed for Art Rooney, Sr., the founding owner of the Steelers.  If McCullough gets the 16th Street Bridge, perhaps the West End Bridge or 31st Street Bridge should be the one to be renamed for Rooney as he lived on the North Side and they are the only significant bridges left that connect to that part of Pittsburgh.

Another article of interest relating to the discussion of renaming bridges was published yesterday.  It discusses the dilemma of whether or not a living person should be honored in such a way.

What is a Bridge? Pittsburgh Edition II

When I wrote the first “What is a Bridge?” post, I felt confident that Merriam-Webster’s definition of a bridge, “a structure carrying a pathway or roadway over a depression or obstacle,” was sufficiently explicit to exclude ramps.  However, while crossing the Penn Avenue Bridge in East Liberty I found a new structure to challenge the definition of a bridge.

The former bus ramp from the former Penn Avenue (Bus) Station to the (not former) East Liberty Busway Station meets the above definition of a bridge as it carries a roadway over the obstacle presented by the railroad bordering the busway.  On the other hand, it also meets the definition of a ramp, “a slope or inclined plane for joining two different levels,” as the busway is significantly lower than most of the surrounding area.  So, is it a bridge or a ramp?  It almost feels like asking is a tomato a fruit or vegetable? or perhaps even which came first, the chicken or the egg?  Are these equally impossible questions to answer or is it rather the case that there are exceptions to every rule?  There aren’t always easy or straight-forward answers.  I suppose in this case the structure is both a bridge and a ramp.

Perhaps a way to answer the question a little more specifically is to look at the way it is used.  In its previous use, the point of the structure was to get buses down onto or up out of the lower busway level.  While it was used in this fashion, I’d say it was more a ramp than a bridge.  There is a future plan for it to be turned into a pedestrian bridge to transport pedestrians safely across the railroad and busway to the busway station (see Busway Bridges: East Liberty).  At that point, in function the structure will be more of a bridge, though I suppose the ramp end will still function as a ramp to provide an accessible route to the station.  Whether it is a ramp or a bridge, I did not walk it yet as it is not currently designed for pedestrian access.  After its conversion is complete in the next couple years, I will come back to walk it.

Other posts in this series:

What is a Bridge? Pittsburgh Edition I (July 18, 2012)

What is a Bridge? Chicago Edition I (April 18, 2013)

What is a Bridge? Chicago Edition II (February 1, 2020)

What is a Bridge? Bethlehem Edition I (July 1, 2020)

What is a Bridge? Bethlehem Edition II (July 15, 2020)

The Last Allegheny River Bridge

The last bridge across the Allegheny I needed to cross was the 62nd Street Bridge.  While the approach to the bridge less than inviting, the bridge itself was surprisingly pleasant to cross.  The approach was a skinny sidewalk overgrown and broken in spots connected directly to a very fast-paced road.  This approach is similar to the one for the Highland Park Bridge (see June 10 post).  For this reason and because the 62nd Street and Highland Park bridges are the two farthest from downtown on the Allegheny, I compared the experience of walking across these two bridges.  The 62nd won by a long shot.  Its sidewalk is much wider and it has sidewalk on both sides.  The Highland Park Bridge has a high mesh fence enclosing you in, while the 62nd Street Bridge has a shorter waist-/chest-height railing similar to those on the 31st and 40th Street bridges (see July 19 and July 20 posts).  The traffic was also much lighter on the 62nd compared to the Highland Park Bridge, although I imagine that at rush hour the 62nd might get busier than when I crossed it.

I was surprised that there is still a good view of downtown from the 62nd Street Bridge.  The river bends quite a bit before getting to 62nd Street, so much so that the 40th Street Bridge is not visible from the 62nd.  However, there is a significant stretch of flat land on the southern shore which permits the view of downtown from the northern end of the bridge, by the middle of the bridge only part of downtown is visible, and by the southern end downtown is hidden from sight.

While most of the area surrounding the bridge is industrial or former industrial, the northern end connects to the edge of Sharpsburg, PA, which has a couple interesting looking churches and likely housed industrial workers for many years.

The 62nd Street Bridge also passes by a future site of redevelopment.  I thought I read somewhere last summer about something interesting that was planned for this site, yet when I searched for it today, I could not find what I thought I was looking for.  However, there looks like there is a different interesting story connected with this site.  It seems the site is being considered for a distribution center for the company trying to redevelop the parking lots and produce terminal near the 16th Street Bridge (see July 14 post).  The Post-Gazette has an article explaining that not only does Councilman Dowd have issues with the redevelopment in the Strip (the 16th Street Bridge area), but he also has issues with this redevelopment scheme.  I was sorry to learn that the plans for the site are leaning away from something interesting and more publicly accessible such as a park/retail area.  However based on the surrounding area, it makes sense.  There are only a very few residences nearby and what traffic that does come by is looking for a quick way to get between other points in the city and surrounding region.  Also, there is very minimal bus access to the site.  (There used to be more when the site belonged to the bus company, see article.  There are still bus stop signs along Butler Street from this time.)

Here’s one final note on the 62nd Street Bridge.  Like many of the numbered street bridges, this bridge has an alternative name (see posts on 6th Street, 7th Street, 9th Street, and 40th Street bridges).  The 62nd Street Bridge is also known as the R.D. Fleming Bridge.  For years, I have assumed that R.D. Fleming was in the medical profession, he name suggested medical to me when I was in grade school and the idea has stuck for years.  It would make sense as Pittsburgh has a good reputation for things medical.  However, it turns out that R.D. Fleming was a Republican senator whose district included the region near the bridge.  I could not find an explanation for why this former senator, of all the former senators Pittsburgh has had, was honored by having a bridge named after him.  If anyone knows what made him unique, please share.

Washington’s Crossing Bridge

I walked the 40th Street Bridge last fall after having taken a tour of the Maxo Vanka murals at the St. Nicholas Croatian Catholic Church (pictured above).  Two years after having come up with the idea of walking all the bridges in Pittsburgh, this one was the first that I documented (side note: the camera I had at that time produced pictures of significantly less quality than my current camera).  While the bridge itself was fine for walking across, the approach to it was quite intimidating, so much so that if there was a bus easily accessible and going in the direction I wanted, I would have chickened out and taken it instead.  Between the church and bridge I had to cross through an active road construction zone, cross more than one fast past road, and then walk up a small strip of a highway exit ramp covered in debris and just barely wide enough for passing the people coming the other direction.

The other end of the bridge connects to Lawrenceville and is much more pleasant as it immediately connects to a residential area and there is a little parklet that is designed to encourage pedestrians at one corner.  The large building in the middle of the frame above is Arsenal school, behind which is Arsenal Park.  Both sites were named after the Allegheny Arsenal located on this site during the Civil War, which played a significant role in the war and where there was a major explosion that killed many of the female workers.

On the bridge itself are seals.  I did not look closely at them as on this, my first official walk across a bridge, I was mostly concerned with the views from the bridge and not the bridge itself.  According to these seals are the seals of Allegheny County and the thirteen original colonies repeated up and down the bridge.

The downstream view above looks out over the forested northern end of Herr’s Island toward downtown.  As I mention in the Converted Railroad Bridge post, Herr’s Island has been renamed Washington’s Landing, in honor of George Washington’s crossing of the Allegheny River.  Apparently the official name of the 40th Street Bridge is Washington’s Crossing Bridge, which I was not aware of until looking it up online.  In the cases of the other bridges with double names such as each of the Three Sisters Bridges (see June 14, June 21, and June 22 posts) and the R.D. Fleming/62nd Street Bridge (see July 24 post) both names are used interchangeably, but I have only ever heard this bridge called the 40th Street Bridge.  As the person who commented on the Converted Railroad Bridge pointed out, the island renamed Washington’s Landing wasn’t actually where Washington landed. has a somewhat detailed account of what might have happened when Washington crossed the Allegheny according to which the island he and Christopher Gist landed on after Washington fell into the river was actually on the southern side of the river (Herr’s Island/Washington’s Landing is on the northern side).

Up until this point on the Allegheny River, both sides of the river are part of the City of Pittsburgh.  Now the right-hand side of the river in the upstream view above is Pittsburgh while the left-hand side belongs to other municipalities.

31st Street Bridge

To date I have walked the 31st Street Bridge twice.  The first time was a few years ago when I had over two hours to kill between an event downtown and a meeting in the Strip a few blocks from the bridge.  So I naturally decided to spend it by walking from the first to second location along the Three Rivers Heritage Trail.  It was winter and I saw the first flurries of the season as I crossed this bridge.  For that reason, I remember the walk and the bridge fondly though I was disappointed and surprised when I arrived at the Strip District end of the bridge to realize how far away I was from the stores in the Strip.  I had been planning on getting a snack at one of the nice little ethnic groceries or perhaps at the bakery.  As I was in a car every other time I had been to the Strip, I never realized how little of the neighborhood the stores took up.  Fortunately, there was hot chocolate and a good spread of fruit and pastries at my meeting.

As I sat down to write this post, I realized that I have already discussed most of the observations I had or at least something similar in other posts.  So I went to to look for some inspiration of something new to write.  It has a nice description of the decorations on the bridge (see link), which I completely missed as I walked it this summer either because they aren’t there or because I looked in the wrong places as I thought there might be some decoration.  The other thing that intrigued me on the website was the name of the bridge which is 31st Street Bridge, Number Six Allegheny River.  I thought perhaps this meant it was the sixth bridge at this location; however says that the 31st Street Bridge replaced a former bridge at 30th Street.  While the streets aren’t that far apart, it seems more likely that “number six” refers to it being the sixth bridge up the Allegheny from the Point, yet this would have to be only counting road bridges (not railroad).  The 1929 G.M. Hopkins map shows that the sixth bridge from the point is the 16th Street Bridge when you count the railroad bridge between the 9th and 16th Street bridges.


These are the pictures that go with the topics I’ve discussed in other posts.  On the left is the cookie-cutter, perfectly manicured housing development on Herr’s Island.  In my Converted Railroad Bridge post, I mention how I feel like a trespasser when I walk through this part of the island.  Except for the little lighthouse/widow’s walk attachments on top of the houses (the circular, red peaked roof thing), the development looks identical to some of the newer developments (older being 1960s) in the California town I lived in for several years.

The view downriver, above on the right, shows again the two clusters of tall buildings downtown that I first observed on the 16th Street Bridge (see July 13 post).


Several well-known landmarks (which I have mentioned in other posts) are visible from the 31st Street Bridge.  First on the downstream side (above left) is the Immaculate Heart of Mary Church.  Perhaps because of the lighting and angle, I don’t think it appears as impressive in the picture as it does in real life.  I mentioned this landmark previously in my post about the Fort Duquesne Bridge.  On the other side of the bridge (above right), the most famous landmark is Children’s Hospital, which came up in the 9th Street Bridge post.  Before doing this project, I don’t think I realized just how big Children’s Hospital is.  I thought it was big, but I’ve learned from observing it from the 9th and 31st Street bridges that it is actually huge.  Closer to the bridge a little lower on the hill from the hospital is the St. Augustine Church in Lawrenceville, one of the many large, old, and beautiful churches in the city.  I’d also like to point out the little church on the right-hand side of the photo towering above its surroundings.  I don’t want to go into much detail about it now, but it is one of Pittsburgh’s repurposed churches and I will be coming back to it in a future post.

What is a Bridge? Pittsburgh Edition I

When I reached the next pedestrian accessible bridge to get off of Herr’s Island/Washington’s Landing (after having got on it by the converted railroad bridge), the question of what is a bridge stared me in the face.  I’ve skirted that question since starting this blog, sometimes alluding to it in passing, but never really dealing with it head on.  It came up first with Heth’s Run Bridge.  While in the posts on this bridge (see Part I and Part II) I mention that the deep ravine that the bridge once spanned has been filled in, I don’t discuss what this means for the structure’s status as a bridge.  The question there is: Is a bridge still a bridge if what it bridged has been filled in and the bridge isn’t actually bridging anything anymore?

Then, when I wrote about the Bridge Under a Bridge, I couldn’t help wondering if it was cheating to include this bridge as it was purely an aesthetic bridge built so that a man-made pond could go underneath.  A different aesthetic choice could have led instead to a path bordered by two man-made ponds.  Yet I still refused to address the question of what is a bridge?

At this point, I feel it is necessary to face the question, this point being where the 30th Street Bridge connects to the River Avenue ramp which connects to the 31st Street Bridge.  From the view pictured above of the 30th Street Bridge, it looks like a bridge.  However, from where I got on it (the lower end on the left side in the image above) it looked to me like a ramp taking traffic from a low point to merge onto another road at a higher elevation.  Besides, it connects to the River Avenue ramp and in the junction of these two structures (pictured below), it felt like one continuous ramp system.  Yet, a portion of this system is called a bridge.    So I ask myself, “what is a bridge?”

First, I thought, “a bridge is a structure that connects two points which would otherwise not be accessible to each other.”  Then I realized this definition includes ramps. In my current example, there is no other way that River Avenue, which for most of its course runs at the same level as the bike path in the picture above, would be able to access the 31st Street Bridge without a ramp.  Therefore, according to my definition above the ramp is a bridge.

Another thought I had was “a bridge is a structure that spans a geological obstacle.”  Well then, that means that the bridges that only exist to cross over a road or railroad aren’t really bridges.  I discuss these types of bridges some in my post on Cleveland Bridges.  In that post, I don’t question whether or not they are bridges, but whether they are significant enough to be counted in comparing the number of bridges cities have.  Though I didn’t state it, I also wondered if they were significant enough for me to include these types of bridges in my bridge walking.  Regardless of their significance, I consider them bridges.

Merriam-Webster defines a bridge as “a structure carrying a pathway or roadway over a depression or obstacle.”  This definition seems pretty good as it excludes ramps but includes the bridges over man-made obstacles.  I’d say this definition also would include the Bridge Under a Bridge.  However, it doesn’t address the situation of Heth’s Run Bridge prior to its renovation.  What if the structure “carrying a pathway or roadway” at one time crossed over “a depression or obstacle,” but does so no longer though the structure is still there?  Is it still a bridge?

There is one other dilemma suggested by the 30th Street Bridge/River Avenue Ramp/31st Street Bridge structures, the Fort Duquesne Bridge, the Veterans Bridge, and London’s Jubilee Bridge.  This dilemma is perhaps best expressed by “what makes one bridge?”

In the Veterans Bridge example, three separate structures cross over the obstacle of the lower elevation of the parking lots in the Strip before joining to become one structure across the obstacle of the Allegheny River.  So, is this one bridge or three?

When I walked the Fort Duquesne Bridge, I was walking a pedestrian bridge built approximately 40 years after the Fort Duquesne Bridge.  The pedestrian bridge is attached to the Fort Duquesne Bridge over the Allegheny River, but on either end it is separate with its own supports.  Is this one bridge or two?

London’s Jubilee Bridge has two separate pathways, but one name and dedication date.  They are separated by a bridge for the underground, which, as far as I can tell, they are attached to for structural support.  So is this one, two or three bridges?

The 30th Street Bridge/River Avenue Ramp/31st Street Bridge structures appear to me to be one conglomeration, similar to the three structures that merge in the Veterans Bridge.  Yet while the elements in the Veterans Bridge appear to be considered one structure, the 30th Street Bridge is considered a separate structure from the 31st Street Bridge, at least in so far as it has its own name and its own page on  What makes the 30th Street and 31st Street bridges different from the other examples I’ve listed above?

For a continuation of this discussion see What is a Bridge? Pittsburgh Edition II

Other posts in this series:

What is a Bridge? Pittsburgh Edition II (July 27, 2012)

What is a Bridge? Chicago Edition I (April 18, 2013)

What is a Bridge? Chicago Edition II (February 1, 2020)

What is a Bridge? Bethlehem Edition I (July 1, 2020)

What is a Bridge? Bethlehem Edition II (July 15, 2020)

Converted Railroad Bridge

This is the bridge that I missed when identifying the river bridges to cross on GoogleEarth.  I missed it because it doesn’t cross the entire width of the Allegheny River.  About 2.5 miles upriver from Downtown Pittsburgh is Herr’s Island, also known as Washington’s Landing.  The name Washington’s Landing refers to the story that this was where George Washington spent the night after a crossing of the Allegheny River during which he fell into the river.  (The folk song “The Forks of the Ohio” describes the incident.)  Herr’s Island refers to one of the original landowners of the island, Benjamin Herr.

One of the names of this bridge is Herr’s Island Railroad Bridge.  While lists multiple names for the bridge, none of them refer to the new use of the bridge as a pedestrian bridge.  The bridge connects the northern shore of the Allegheny with Herr’s Island and I image was very well used while the island was covered with industry.  Now is it a very pleasant pedestrian bridge connecting the northern branch of the Three Rivers Heritage Trail with Herr’s Island, which now features a swanky residential area.


The view upstream shows the little stretch of the Allegheny that separates the northern shore from Herr’s Island, while the downstream view captures downtown.

At the Herr’s Island end of the bridge is a nice look-out space featuring this compass with the three rivers.  While this part is nice and seems to welcome the public, I always feel very awkward as I continue on the trail along Herr’s Island.  The way the island was developed, it feel like it’s a private, gated community and people like me who use the trail but don’t live there are interlopers and trespassers.

16th Street Bridge-Developments


The southern end of the 16th Street Bridge soars over an area that is currently provoking controversy in the city.  It is a site where there are what feels like be miles of barren (although used) parking lots right up against the river on either side of the bridge.  It is a very un-pedestrian-friendly area and a very unattractive place.  Alongside these parking lots on one side of the bridge is the historically significant produce terminal building.  While a developer has put forward a plan to redevelop the area, connecting the existing Strip District to the Allegheny River and adding new mixed development in place of the parking lots, part of the plan requires a partial demolition of the produce terminal.  (A description of this intended development can be read in the article linked here.)

In the beginning of June, City Councilman Dowd began holding up funding for the project, saying he wanted more information about how the funding was to be used (see article).  Then about a week ago, two more councilmen voiced their wish for more information about the use of the funding as well as other aspects of the project such as how the community has been engaged (see article).  Another newspaper article from a few days ago, describes a lawsuit being filed about the property and the development.  This article explains, “The lawsuit alleges that the city is not following its own stormwater management program nor that of the federal Environmental Protection Agency in allowing the project.”

Based on what I’m learning in my internship this summer, this seems like the opposition against, or at least concerns, about the project are piling high enough to prevent the development from happening.  As I am not a fan of harsh, stark parking lots currently in place, it would be a shame for the project to fall through.  However, if the claims of the opposition are true, then it seems we need to find someone else to develop the site.  As awful as the parking lots are, their removal is not worth the price of poorly spent funds, no community engagement, and poor storm water management.  The last concern is the most significant given the fact that the city’s storm water management already causes problems.  (For more related to this issue seen my Heth’s Run Bridge post.)

One River Down!!

This week I officially crossed all the pedestrian accessible bridges in Pittsburgh across the Allegheny River.  I still have a few more to post about, but I’m so excited about having reached this milestone, I had to share it with my readers.  I finished the legwork and now just need to complete the fingerwork to be geographically one-third of the way to reach my goal for the summer.

Of the 20 bridges I initially identified as pedestrian accessible over the three rivers in Pittsburgh (see May 30th post), 10 cross the Allegheny River.  It turns out one of these that I identified wasn’t actually pedestrian accessible, though I posted about it anyway (see June 24th post).  However, it turns out that I missed a bridge on the Allegheny when picking them out on the map.  So I still crossed 10 out of 20 bridges.

I have been using the term pedestrian accessible because not all of the bridges I crossed were necessarily pedestrian friendly.  From the Point downtown up to the 31st Street Bridge (see July 19 post) the bridges were mostly pedestrian friendly.  The 31st Street Bridge begins to get a little dubious.  Farther upriver, while the bridges remain accessible, they are not particularly pedestrian friendly.  See Highland Park Bridge, Washington’s Crossing Bridge and The Last Allegheny River Bridge posts.