I-35E in St. Paul: Legal grounding for truck restrictions?

[Revive 755]

I'm looking for information on how I-35E in St. Paul is allowed to have trucks restricted, but is yet allowed to remain in the interstate system.  Main purpose I have is to theoretically look at banning trucks from the I-55 ramps to and from the Poplar Street Bridge in St. Louis.  So far it seems that this ban is the result of a court settlement, but I haven't found much more than this.  Any info is greatly appreciated.

[TheStranger]

The one comparable that comes to mind out here is I-580 along the MacArthur Freeway which has had a truck ban for some time - but this dates back to when the route was just US 50 and as such, was grandfathered in (with 880/238 as the suggested truck route instead).

[74/171FAN]

I-66 has a truck ban in VA inside the Beltway but that was due to a settlement with Arlington County who didn't want the road built.

[Alps]

I-278 has a truck restriction in NYC where it had to use Grand Central Parkway.  I imagine that truck restrictions are just considered a substandard design element like every other exception.

[froggie]

I'm looking for information on how I-35E in St. Paul is allowed to have trucks restricted, but is yet allowed to remain in the interstate system.  Main purpose I have is to theoretically look at banning trucks from the I-55 ramps to and from the Poplar Street Bridge in St. Louis.  So far it seems that this ban is the result of a court settlement, but I haven't found much more than this.  Any info is greatly appreciated.

That's exactly what it was.  A court settlement.  I don't have the nitty-gritty details (MnDOT would), but in a nutshell, the settlement allowed MnDOT to build the road in return for narrowing it to 4 lanes (the original plan was 6 lanes) and both the truck restrictions and the requirement for a 45 MPH speed limit.

[J N Winkler]

An interesting question is whether granting of a truck ban has to be linked to the availability of a bypass route on the same system which can handle trucks (similar to the requirements governing exceptions to minimum Interstate bridge clearances).