Diamond Bar Municipal Code Div. 4 Turning Movements

(a) Whenever the city council or city engineer finds and determines that in order to facilitate the movement of traffic at any intersection that vehicles should take a different course than that specified in Vehicle Code § 22100, or that right- or left-hand turns should be made from more than one lane, or that vehicles in certain lanes should be required to turn left or right, the city engineer shall place at such an intersection buttons, signs or markers so indicating, pursuant to Vehicle Code § 22101.

(b) At those intersections where the city engineer has placed buttons, signs or markers requiring right- or left-hand turns, no driver shall drive a vehicle other than as directed and required or permitted by such markers, buttons or signs.

(Ord. No. 14(1989), § 2(15.40.010), 6-27-89)

(a) At locations where channelization devices have been placed and the city engineer finds that it is necessary to prohibit left turns or right turns for the purpose of diminishing the hazard of collision, he shall place appropriate signs prohibiting such left or right turns.

(b) At those intersections where the city engineer has placed such signs, no person shall operate a vehicle other than as permitted by such signs.

(Ord. No. 14(1989), § 2(15.40.020), 6-27-89; Ord. No. 05(1999), § 15, 5-18-99)

(a) At all other locations at which the city council has determined and found that the elimination of left turns or right turns is necessary to reduce traffic congestion or to diminish the hazard of collision, the city engineer shall place appropriate signs prohibiting such left or right turns.

(b) At those intersections where the city engineer has placed such signs, no person shall operate a vehicle other than as directed and required or permitted by such signs.

(Ord. No. 14(1989), § 2(15.40.030), 6-27-89; Ord. No. 05(1999), § 16, 5-18-99)

When appropriate signs have been erected pursuant to Vehicle Code § 21453, the driver of a vehicle which is stopped in obedience to a red or stop signal shall not make a right turn against such red or stop signal at any approach to any intersection when the city council has determined that such turns at such location would interfere with the safe and orderly movement of traffic.

(Ord. No. 14(1989), § 2(15.40.040), 6-27-89)

If the city council finds that the volume of traffic, the width of the highway, and other traffic conditions at any intersection are such that the making of a U-turn at such intersection would create a traffic hazard, the city engineer shall erect and maintain in a conspicuous place at such intersection an adequate sign stating that such U-turns are prohibited. No person shall operate a vehicle in violation of such signs when erected.

(Ord. No. 14(1989), § 2(15.40.050), 6-27-89; Ord. No. 05(1999), § 17, 5-18-99)