When driving in Idaho, you must:

Idaho law requires you to drive at a speed that is reasonable and prudent at all times. Decrease your speed any time conditions are less than perfect for driving.

• Always drive at the maximum posted speed limit.
• Drive at a speed that is reasonable and prudent at all times.
• Drive 10 mph below the posted speed limit at all times.
• Always drive at the same speed as the vehicles around you.