Speed Limit Laws: Idaho

Rural Interstates

Cars (MPH) Trucks (MPH)
75, 80 on specified segments 70

Urban Interstates

Cars (MPH) Trucks (MPH)
75, 80 on specified segments 65

Other Limited Access Roads

Cars (MPH) Trucks (MPH)
70 70
State
Idaho
Issue
Speeding and Aggressive Driving
Determinations
Rural Interstates: Cars (MPH)

75, 80 on specified segments

Rural Interstates: Trucks (MPH)

70

Urban Interstates: Cars (MPH)

75, 80 on specified segments

Urban Interstates: Trucks (MPH)

65

Other Limited Access Roads: Cars (MPH)

70

Other Limited Access Roads: Trucks (MPH)

70