# Meaning of reverse banked

I have been given the following question of Newtonian mechanics.

A road has a (horizontal) curve of radius R. The engineer was, however, unclear on the concept, and banked the road (angle Ɵ) in THE WRONG DIRECTION (i.e., reverse banked). The coefficient of static friction between the wheels of a car (mass “m”) and the road surface is 0.80. Find the fastest speed the car can have and still maintain its ability to track (i.e., follow the curve without slipping)

I am not sure about the sentence "The engineer was, however, unclear on the concept, and banked the road (angle Ɵ) in THE WRONG DIRECTION (i.e., reverse banked)", in particular the meaning of "reversed banked". Does it mean the engineer (the designer of the road?) instead of tilting the road towards the inside of the turn made the road inclined towards the outside of the turn?

Could somebody help to clarify this question?

• When you "bank" a road, on a curve, you tilt the road surface so that it slants to the "inside" of the curve. As you guess, he has it slanting outwards instead. May 31, 2018 at 1:29
• This answer, and the links from the DOT at the bottom, is related: physics.stackexchange.com/a/408229/170832 to road design.
– Rob
May 31, 2018 at 1:31
• @Hot Licks Got it! Thanks a lot for the confirmation! May 31, 2018 at 2:15
• @Rob Thank you so much for referring me to the old question containing very rich relevant material! May 31, 2018 at 2:17