Truss vs. tubular gantries by state

[Pink Jazz]

I would like to know, what type of gantries are current standard installation by each state - truss or tubular?

Here is what I know:

• Arizona - Tubular
• California - Mostly truss, but some tubular gantries installed as well.
• Nevada - Truss
• New Mexico - Tubular
• Virginia - Truss

Does anyone know about other states?

[Zeffy]

New Jersey is definitely truss, I don't think I have seen a tubular gantry yet.

[OCGuy81]

Washington State seems to use a lot of tubular, at least from what I've seen.

[Pink Jazz]

New Jersey is definitely truss, I don't think I have seen a tubular gantry yet.

I don't recall ever seeing tubular gantries anywhere on the East Coast, however, I didn't pay too much attention to each state I have been to since I was too young, so I didn't include them in my list.

[Zeffy]

I think some places in New York have tubular gantries, but other than that I'm pretty sure most states on the East Coast are still majority truss.

[roadman65]

Tampa area on I-4 and I-275 uses tubular on its freeways, but FDOT usually uses truss.
https://www.flickr.com/photos/54480415@N08/15615594610/
https://www.flickr.com/photos/54480415@N08/15633207768/in/photostream/

[Pete from Boston]

As far as I can tell, Mass. only has tubular on roadways built as part of the Big Dig.  Never seen them elsewhere.

Connecticut has just about every type ever invented, including the two-piece cantilever setup that I'm sure has a more proper name.

[swbrotha100]

I've seen tubular gantries in parts of Colorado and Texas. It's been rare to see tubular gantries in the Northeast.

[Pink Jazz]

I've seen tubular gantries in parts of Colorado and Texas. It's been rare to see tubular gantries in the Northeast.

I think the El Paso district of TXDOT uses tubular gantries as standard installation; not sure about the rest of the state.

[TheHighwayMan3561]

Minnesota is almost all truss, one notable exception being the gantries on the "new" (if six years old isn't really new anymore) I-35W bridge which features tubulars.

[yanksfan6129]

New Jersey is definitely truss, I don't think I have seen a tubular gantry yet.

There does happen to be a tubular gantry on I-80 way out west.

http://goo.gl/maps/wLbdZ

[roadman65]

The new Woodrow Wilson Bridge across the Potomac River uses tubular gantries.

[Ian]

In Pennsylvania, the PTC primarily uses tubular gantries for its new overheads, while PennDOT seems to be using a combination of both.

[tdindy88]

Indiana, to my knowledge, has tubular gantries in exactly two places, 71st and 86th Streets at I-465 on the northwest side. But not on the interstate itself, only the streets. Beyond that, it's all trusses.

[Brandon]

Illinois uses truss gantries with these few exceptions:

Chicago Skyway (installed by the City of Chicago), and
I-Pass ORT lanes for the ORT equipment.

Now, that said, ISTHA and IDOT use two different types of trusses.  IDOT uses a square one while ISTHA uses a triangular one.

[jeffandnicole]

New Jersey is definitely truss, I don't think I have seen a tubular gantry yet.

There does happen to be a tubular gantry on I-80 way out west.

http://goo.gl/maps/wLbdZ

I'm pretty sure that's a DRJTBC install, which just happens to be in NJ.  Surprised NJDOT didn't demand a truss!

Delaware uses tubes, but not the kind normally used elsewhere.  It's more like an limbo assembly.  http://goo.gl/maps/dr77M .

[roadman65]

I am surprised that the exit for PA 611 from New Jersey gets better signage than its very own exit for Millbrook & Flatbrookville.

Plus they got Stroudsburg wrong.  Yes PA 611 goes there from that particular exit, but so does straight through I-80.  Then when the 7th Street Viaduct was closed for replacement, the detour into Downtown Stroudsburg was back onto I-80 again.  It is because the ramps leading to PA 611 are under the bridge authority's jurisdiction.

It definitely is DRTJC doing as jeffandnicole pointed out.

[thenetwork]

Colorado is slowly moving towards tubular and away from trusses. Meanwhile, Utah is well advanced in the use of tubular vs. Colorado.

Ohio is starting to get onto the tubular bandwagon after its' first noticeable assembly on the northern half of I-280 in Toledo (as part of the recent Glass City Skyway bridge project).

[SignGeek101]

Ontario uses trusses.

[1995hoo]

The Intercounty Connector in Maryland uses brown tubular gantries. They definitely have a less "industrial" look to them. The Wilson Bridge has been mentioned above. Otherwise, Maryland generally seems to lean towards truss; I don't know whether the tubular design is a general policy for new installations or is a case-by-case thing. A lot of attention was paid to the ICC design. I remember remarking when the ICC opened how the overall visual effect between the brown tubular gantries, the nicely-designed sound walls, and the finished overpasses gave it more of a parkway feel.

Virginia uses truss and seems to be moving from the three-bar triangular style to more of a box-girder style, though that could also just be a Northern Virginia thing since the majority of the new ones I've seen recently were in conjunction with the HO/T lane projects.

[cpzilliacus]

The new Woodrow Wilson Bridge across the Potomac River uses tubular gantries.

All gantries (for signs and toll collection equipment) on Md. 200 (ICC) use the same style of gantries.

I-95 between the Capital Beltway and Baltimore Beltway has a few "Autobahn-style" gantries, but nearly all the rest around Maryland use truss gantries.

[Ian]

Delaware uses tubes, but not the kind normally used elsewhere.  It's more like an limbo assembly.  http://goo.gl/maps/dr77M .

I've seen similar set ups in Rhode Island, Mass, and New Hampshire.

[cpzilliacus]

The Intercounty Connector in Maryland uses brown tubular gantries. They definitely have a less "industrial" look to them. The Wilson Bridge has been mentioned above. Otherwise, Maryland generally seems to lean towards truss; I don't know whether the tubular design is a general policy for new installations or is a case-by-case thing. A lot of attention was paid to the ICC design. I remember remarking when the ICC opened how the overall visual effect between the brown tubular gantries, the nicely-designed sound walls, and the finished overpasses gave it more of a parkway feel.

In the preliminary engineering for the ICC, the artistic renderings certainly had a "parkway-like" feeling to them, though the road was always intended to be open to all traffic (late in the game, some politicians and activists opposed to the project wanted an inside-the-Beltway I-66-type ban on trucks, but the state rejected that, at least in part because of a potential loss of toll revenue).

In the final engineering and design, each of the four design-build teams had to have at least one landscape architect on the team to assure the design was consistent, and looked nice. 

IMO, they have succeeded.

[Mergingtraffic]

As far as I can tell, Mass. only has tubular on roadways built as part of the Big Dig.  Never seen them elsewhere.

Connecticut has just about every type ever invented, including the two-piece cantilever setup that I'm sure has a more proper name.

CT seems to have stopped using the tubular only if the design of the project is being built today but was designed 10 years ago.  No new designs seem to have them.

Here's a pic of tubes and right aligned borderless exit tab.

[CANALLER]

My project for this year has only one new structure, a truss over the Inner Loop.   I've never had a tubular assembly on any of my projects.