Daily conversation: What is the worst possible answer?

[Dirt Roads]

What is a little-known requirement in the Interstate System standards?

All cuts through mountainsides in Appalachia need to extract a sufficient amount of marketable coal to pay for that section of highway construction.  Bonus if you can make candles out of it.

[I-55]

What is a little-known requirement in the Interstate System standards?

The rumble strips on the shoulder were added so that tanks can run their treads in the grooves.

[paulthemapguy]

What is a little-known requirement in the Interstate System standards?

All Interstate-standard highways in areas that receive more than 20 inches of snow annually shall be jointed plain concrete pavement, so that after five full winters, drivers can enjoy the same up-and-down exhilaration experienced by a person operating a Wave Runner.

[formulanone]

What is a little-known requirement in the Interstate System standards?

On a random day every month, cargo aircraft are required to perform landings on every 5 miles of curved interstate, since runways rarely have curves, and the pilots need the practice.

[jeffandnicole]

What is a little-known requirement in the Interstate System standards?

No drivers exam should ever take place on an interstate highway, leaving people to endless argue about etiquette pertaining to merging and keeping right.

[TheCatalyst31]

What is a little-known requirement in the Interstate System standards?

While the repeal of the NMSL mostly left interstate speed limits up to the states, four-lane interstates are still required to set the speed limit for trucks in the left lane at just barely above however fast the trucks in the right lane are going.