[Xringer]

A timer is going to have a problem anytime you have to slow down (or speed up) due to traffic or pedestrians etc.


I think that Real-Time control would be much better than a timer for climbing hills.
If slowly decreasing the throttle going up a hill, so that you are at 32 MPH as you reach the top, is a good strategy for you,
Then it could be done using a computer, if it knew in advance how long the hill was.. (Using a learned map).