Turn's out Panem has road's and possibly motor vehicles after all, but how can that be? (HUNGER GAMES - MOCKINGJAY PART 2)

thought i would point it out for anybody that haven't noticed yet.

http://andrew-hodgson.com/wp-content/uploads/2015/07/trailerShot2.jpg or you could just search the term in google images "mockingjay part 2 hovercraft" and it should be the first image with 2 hovercraft's grounded while one is taking off out front of the damaged building.

but why are the double road lines painted white instead of being yellow?