Double-deck highway map/list

[Alex4897]

Portions of the Selmon Expressway in Tampa count towards this, as the express lanes tends to stay over top of the mainline.

[yanksfan6129]

I-10/I-35 in downtown San Antonio has double deck portions. Also, I-35 between the northern split with I-10 and its interchange with I-37 is mostly double deck.

[Jardine]

Is Meridian Bridge still open to cars ?

(don't think so, and IIRC, it was NB on top and SB on bottom, or vice versa)

[jemacedo9]

I-95 Girard Point Bridge in Philly...

[Jardine]

Meridian Bridge is ped only now.

At one time, upper level was 2 way for autos and lower was for trains.  No train ever passed over bridge, it was reconfigured for cars/trucks both levels.

Lift mechanism was removed in '84 according to Wiki.

[Big John]

Atlanta:  West Peachtree St. over I-75/85.  Upper deck is the roadway and the lower deck is MARTA rail.

[kendancy66]

Has the San Rafael bride been mentoned yet?  I580 bridge near San Francisco

[KEK Inc.]

I-90 west of I-5.

[iBallasticwolf2]

I have added all suggestions that fit the criteria on page 1 of this thread. Some of the suggestions did not fit the criteria or were repeats or already added points.
https://www.google.com/maps/d/edit?mid=z-VLEHpOEovg.kLwb3P95an2k&usp=sharing

[Scott5114]

https://www.google.com/maps/d/edit?mid=z-VLEHpOEovg.kLwb3P95an2k&usp=sharing
Here's the list, if anyone wants to add another double-deck structure to the list please tell me where it is and I will add it.
Critea for list:
All structures must be double-deck.
Each deck can have whatever on it as long as it is two decks.
Something like I-10's lower and upper level configuration in San Antonio does NOT count as a double-deck road.

Kansas City, Michigan?? [emoji14]

[iBallasticwolf2]

https://www.google.com/maps/d/edit?mid=z-VLEHpOEovg.kLwb3P95an2k&usp=sharing
Here's the list, if anyone wants to add another double-deck structure to the list please tell me where it is and I will add it.
Critea for list:
All structures must be double-deck.
Each deck can have whatever on it as long as it is two decks.
Something like I-10's lower and upper level configuration in San Antonio does NOT count as a double-deck road.

Kansas City, Michigan?? [emoji14]

The upper and lower level thing means like the upper level being elevated over the lower level like on the Selmon Expressway. When I mean double-deck I mean like the two decks being on top of each other like the Western Hills Viaduct.

[noelbotevera]

I-490 is a double decker near the western terminus.
I-5 through Seattle is a double decker.

[iBallasticwolf2]

I-490 is a double decker near the western terminus.
I-5 through Seattle is a double decker.

1. I've looked at both I-490's western terminuses, neither are double-deckers.
2. Already got it but thanks!

[yanksfan6129]

Something like I-10's lower and upper level configuration in San Antonio does NOT count as a double-deck road.

I guess I wasn't paying attention. Oops.

That being said, I'm not sure why it wouldn't count.

[noelbotevera]

I-490 is a double decker near the western terminus.
I-5 through Seattle is a double decker.

1. I've looked at both I-490's western terminuses, neither are double-deckers.

Must've got the wrong picture. I think it might've been OH 176 goes into a double decker near the I-90/I-77/I-490 area.

Here's my picture referral:

https://www.google.com/search?q=double+decker+highway&tbm=isch&imgil=1Jm6jGmMqXSv7M%253A%253B2Ha2LiyWz7-McM%253Bhttp%25253A%25252F%25252Fwww.interstate-guide.com%25252Fi-490_oh.html&source=iu&pf=m&fir=1Jm6jGmMqXSv7M%253A%252C2Ha2LiyWz7-McM%252C_&biw=1079&bih=1005&usg=__zuEMMTheJw2wXi2MqOE8cpPatHk%3D&ved=0CCgQyjdqFQoTCNyi9Jjb6McCFckWPgodRlgC8g&ei=fX_vVZzwL8mt-AHGsImQDw#imgrc=1Jm6jGmMqXSv7M%3A&usg=__zuEMMTheJw2wXi2MqOE8cpPatHk%3D

[Mergingtraffic]

I-84 on the Mixmaster Interchange [viaduct] with CT 8 in downtown Watrbury, Connecticut. Eastbound on top, westbound on the bottom. 

CT-8 is also double decked south of I-84....NB on top, SB underneath between I-84 and Exit 30.

[roadman]

Northeast Expressway (US 1) doesn't count, as the 'double deck' roadway separates into 'side by side' at the end of the Tobin Bridge.  Prior to November 2009, when MassDOT was formed and took over the Tobin Bridge, there were 'State Highway Begins/Ends" signs denoting the location.

[Walleye2013]

I-490 is a double decker near the western terminus.
I-5 through Seattle is a double decker.

1. I've looked at both I-490's western terminuses, neither are double-deckers.

Must've got the wrong picture. I think it might've been OH 176 goes into a double decker near the I-90/I-77/I-490 area.

Here's my picture referral:

https://www.google.com/search?q=double+decker+highway&tbm=isch&imgil=1Jm6jGmMqXSv7M%253A%253B2Ha2LiyWz7-McM%253Bhttp%25253A%25252F%25252Fwww.interstate-guide.com%25252Fi-490_oh.html&source=iu&pf=m&fir=1Jm6jGmMqXSv7M%253A%252C2Ha2LiyWz7-McM%252C_&biw=1079&bih=1005&usg=__zuEMMTheJw2wXi2MqOE8cpPatHk%3D&ved=0CCgQyjdqFQoTCNyi9Jjb6McCFckWPgodRlgC8g&ei=fX_vVZzwL8mt-AHGsImQDw#imgrc=1Jm6jGmMqXSv7M%3A&usg=__zuEMMTheJw2wXi2MqOE8cpPatHk%3D

I've driven on that section of road, and I think that the double-deck portion is going to be/was removed with the reconstruction of the innerbelt.

[dfwmapper]

Not sure if it counts, but the new tolled express lanes on I-635 across north Dallas opened on September 10, and many sections of those have the free lanes running directly above them. There are columns in the center and the beams cross the entire roadway, so it has a very different feel than I-10 in San Antonio or I-35 in Austin, which are basically just really long flyovers.

[thenetwork]

I-490 is a double decker near the western terminus.
I-5 through Seattle is a double decker.

1. I've looked at both I-490's western terminuses, neither are double-deckers.

Must've got the wrong picture. I think it might've been OH 176 goes into a double decker near the I-90/I-77/I-490 area.

Here's my picture referral:

https://www.google.com/search?q=double+decker+highway&tbm=isch&imgil=1Jm6jGmMqXSv7M%253A%253B2Ha2LiyWz7-McM%253Bhttp%25253A%25252F%25252Fwww.interstate-guide.com%25252Fi-490_oh.html&source=iu&pf=m&fir=1Jm6jGmMqXSv7M%253A%252C2Ha2LiyWz7-McM%252C_&biw=1079&bih=1005&usg=__zuEMMTheJw2wXi2MqOE8cpPatHk%3D&ved=0CCgQyjdqFQoTCNyi9Jjb6McCFckWPgodRlgC8g&ei=fX_vVZzwL8mt-AHGsImQDw#imgrc=1Jm6jGmMqXSv7M%3A&usg=__zuEMMTheJw2wXi2MqOE8cpPatHk%3D

That is correct.  It is a tiny 1/4-mile doubledeck with SR-176 North on the lower deck and I-71 on the upper -- with both routes "ending" at the I-90/I-490 interchange.

Meanwhile, on the other end of the state, you have I-71/I-75 over the Brent Spence Bridge in Cincinnati -- Upper deck Southbound / Lower deck Northbound.

[rawmustard]

I doubt the Portage Lake Lift Bridge can count because both decks can't be used by motor vehicles at the same time. (The railroad which once served the bridge is gone.) EDIT: Although in winter, it's lowered to the lowest position to allow snowmobiles to cross, so maybe only part-time double-decker for traffic?

[iBallasticwolf2]

I doubt the Portage Lake Lift Bridge can count because both decks can't be used by motor vehicles at the same time. (The railroad which once served the bridge is gone.) EDIT: Although in winter, it's lowered to the lowest position to allow snowmobiles to cross, so maybe only part-time double-decker for traffic?

I'd still count it because it is still carries traffic at least a some point every year.

[kphoger]

Something like I-10's lower and upper level configuration in San Antonio does NOT count as a double-deck road.

I guess I wasn't paying attention. Oops.

That being said, I'm not sure why it wouldn't count.

I agree. I haven't driven the San Antonio portion in a while to remember, but the Austin portion certainly does have the upper roadway hanging over the lower portion, such that one car is driving directly underneath another.

Mexico City deserves honorable mention, as there is a substantial number of miles of double-decked highway. See the western bypass of the city for a good example (continuation of the Querétaro highway, of which a portion Google Maps actually labels 'Viaducto Elevado Bicentenario', i.e. Bicentennial Elevated Expressway).