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(a) (a) Whenever the Department of Transportation or local authorities with respect to highways under their respective jurisdictions determines upon the basis of an engineering and traffic investigation that the designation of a specific lane or lanes for the travel of vehicles required to travel at reduced speeds would facilitate the safe and orderly movement of traffic, the department or local authority may designate a specific lane or lanes for the travel of vehicles which are subject to the provisions of Section 22406 and shall erect signs at reasonable intervals giving notice thereof.

(b) (b) Any trailer bus, except as provided in Section 21655.5, and any vehicle subject to the provisions of Section 22406 shall be driven in the lane or lanes designated pursuant to subdivision (a) whenever signs have been erected giving notice of that designation. Except as otherwise provided in this subdivision, when a specific lane or lanes have not been so designated, any of those vehicles shall be driven in the right-hand lane for traffic or as close as practicable to the right edge or curb. If, however, a specific lane or lanes have not been designated on a divided highway having four or more clearly marked lanes for traffic in one direction, any of those vehicles may also be driven in the lane to the immediate left of that right-hand lane, unless otherwise prohibited under this code. When overtaking and passing another vehicle proceeding in the same direction, the driver shall use either the designated lane, the lane to the immediate left of the right-hand lane, or the right-hand lane for traffic as permitted under this code.

This subdivision does not apply to a driver who is preparing for a left- or right-hand turn or who is entering into or exiting from a highway or to a driver who must necessarily drive in a lane other than the right-hand lane to continue on his or her intended route.

使用固定来源版次；适用日期与例外以原文及历史沿革为准。Uses a fixed source edition; check the original and statutory history for operative dates and exceptions.

No person shall drive a vehicle upon a highway at a speed greater than is reasonable or prudent having due regard for weather, visibility, the traffic on, and the surface and width of, the highway, and in no event at a speed which endangers the safety of persons or property.

使用固定来源版次；适用日期与例外以原文及历史沿革为准。Uses a fixed source edition; check the original and statutory history for operative dates and exceptions.

No person may drive any of the following vehicles on a highway at a speed in excess of 55 miles per hour:

(a) (a) A motortruck or truck tractor having three or more axles or any motortruck or truck tractor drawing any other vehicle.

使用固定来源版次；适用日期与例外以原文及历史沿革为准。Uses a fixed source edition; check the original and statutory history for operative dates and exceptions.

(a) (a) A person shall not drive a motor vehicle while holding and operating a handheld wireless telephone or an electronic wireless communications device unless the wireless telephone or electronic wireless communications device is specifically designed and configured to allow voice-operated and hands-free operation, and it is used in that manner while driving.

(c) (c) A handheld wireless telephone or electronic wireless communications device may be operated in a manner requiring the use of the driver’s hand while the driver is operating the vehicle only if both of the following conditions are satisfied:

(c)(1) (1) The handheld wireless telephone or electronic wireless communications device is mounted on a vehicle’s windshield in the same manner a portable Global Positioning System (GPS) is mounted pursuant to paragraph (12) of subdivision (b) of Section 26708 or is mounted on or affixed to a vehicle’s dashboard or center console in a manner that does not hinder the driver’s view of the road.

(c)(2) (2) The driver’s hand is used to activate or deactivate a feature or function of the handheld wireless telephone or wireless communications device with the motion of a single swipe or tap of the driver’s finger.

使用固定来源版次；适用日期与例外以原文及历史沿革为准。Uses a fixed source edition; check the original and statutory history for operative dates and exceptions.

No person shall operate any motor vehicle, trailer or semitrailer upon any portion of a highway without tire traction devices when that portion of the highway is signed for the requirement of tire traction devices. In any case where a passenger vehicle or motortruck having an unladen weight of 6,000 pounds or less may be required by the Department of Transportation or local authorities to be equipped with tire traction devices, the devices shall be placed on at least two drive wheels, or the department or local authorities may provide, in the alternative, that the vehicle may be equipped with snow-tread tires on at least two drive wheels when the weather and surface conditions at the time are such that the stopping, tractive, and cornering abilities of the snow-tread tires are adequate. The snow-tread tires shall be of a type and design manufactured for use on snow as a replacement for tire chains or tire traction devices, shall be in good condition, and shall bear the marking of M-S, M/S, or other marking indicating that the tire was manufactured for use on snow, or, in the case of tires purchased before January 1, 1987, shall either bear the markings or, in the opinion of the inspecting officer, comply with the tread pattern requirements of Section 558.

使用固定来源版次；适用日期与例外以原文及历史沿革为准。Uses a fixed source edition; check the original and statutory history for operative dates and exceptions.