Speed

49-654.  BASIC RULE AND MAXIMUM SPEED LIMITS.

(1) No person shall drive a vehicle at a speed greater than is reasonable and prudent under the conditions and having regard to the actual and potential hazards then existing. Consistent with the foregoing, every person shall drive at a safe and appropriate speed when approaching and crossing an intersection or railroad grade crossing, when approaching and going around a curve, when approaching a hillcrest, when traveling upon any narrow or winding highway, and when special hazards exist with respect to pedestrians or other traffic or by reason of weather or highway conditions.
(2)  Where no special hazard or condition exists that requires lower speed for compliance with subsection (1) of this section the limits as hereinafter authorized shall be maximum lawful speeds, and no person shall drive a vehicle at a speed in excess of the maximum limits:
(a)  Thirty-five (35) miles per hour or a lesser maximum speed adopted pursuant to section 49-207(2)(a), Idaho Code, in any residential, business or urban district;
(b)  Thirty-five (35) miles per hour in any urban district;
(c)  Seventy-five (75) miles per hour on interstate highways;
(d)  Sixty-five (65) miles per hour on state highways;
(e)  Fifty-five (55) miles per hour in other locations unless otherwise posted up to a maximum of sixty-five (65) miles per hour.
(3)  The maximum lawful speed limit on interstate highways shall not exceed sixty-five (65) miles per hour for vehicles with five (5) or more axles operating at a gross weight of more than twenty-six thousand (26,000) pounds.

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