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Earlier editions: 2026-09

Title 10 — VEHICLES AND TRAFFIC›Chapter 10.12 — OPERATION

Diamond Bar Municipal Code Div. 1 Generally

Diamond Bar Municipal Code · 2026-10 edition · updated 2026-10-04 · Diamond Bar

Cite as: Diamond Bar Municipal Code Division 1 · Text as of 2026-10-04

Sec. 10.12.010. - Driver training; driving on closed streets restricted.

No person shall operate any vehicle on any portion of the highway closed to through traffic for driver training except when engaged in driver training or for the purpose of going to or from a point within the specified closed area.

(Ord. No. 14(1989), § 2(15.76.040), 6-27-89; Ord. No. 05(1999), § 8, 5-18-99)

Exceptions & meaning →

Sec. 10.12.020. - School grounds; street closure authorized.

Whenever the city council finds that closing any portion of any street or highway crossing or dividing any school ground is necessary for the protection of persons attending such school or school grounds, it shall instruct the city engineer to place, and the city engineer shall place, or cause to be placed, appropriate signs or barricades, or both, specifying that portion of such street or highway closed to vehicular traffic during such hours and days as the city council may specify, pursuant to provisions of Vehicle Code § 21102.

(Ord. No. 14(1989), § 2(15.76.050), 6-27-89)

Exceptions & meaning →

Sec. 10.12.030. - Operating vehicles on closed streets.

A person shall not operate any vehicle on any portion of the highway closed to traffic pursuant to Vehicle Code § 21101 or section 10.12.020 of this Code.

(Ord. No. 14(1989), § 2(15.76.060), 6-27-89)

Exceptions & meaning →

Sec. 10.12.040. - Funeral processions.

The driver of any vehicle and the rider of any bicycle shall not drive between the vehicles comprising a funeral procession where the vehicle immediately in front of which such driver or rider passes in driving through such procession is conspicuously designated as constituting a part of such procession.

(Ord. No. 14(1989), § 2(15.76.070), 6-27-89)

Exceptions & meaning →

Sec. 10.12.050. - Driving or riding vehicles on sidewalk.

A person shall not operate any bicycle or any vehicle or ride any animal on any sidewalk or parkway except at a permanent or temporary driveway or at specific locations thereon where the city engineer finds that such locations are suitable for, and has placed appropriate signs and/or markings permitting such operation or riding.

(Ord. No. 14(1989), § 2(15.76.080), 6-27-89)

Exceptions & meaning →

Sec. 10.12.060. - Riding on bicycle or motorcycle handlebars.

The driver of a bicycle or motorcycle shall not carry any other person upon the handlebars of such bicycle or motorcycle. A person shall not ride upon the handlebars of any bicycle or motorcycle.

(Ord. No. 14(1989), § 2(15.76.090), 6-27-89)

Exceptions & meaning →

Sec. 10.12.070. - Pedestrian tunnels; closure conditions.

Whenever the city council finds and determines that the use of any pedestrian tunnel is dangerous because of the presence of loiterers, or for other reasons, and that it is not economically feasible to protect such tunnels other than by temporary closure, the city engineer shall install gates and post signs, or cause such gates to be installed, prohibiting the entrance by persons into such a tunnel during such times as the tunnel is not required by pedestrians going to or from the school premises and the city engineer has caused such gates to be locked and posted signs informing the public that such tunnel is temporarily closed. No person shall enter any tunnel closed pursuant to this section, where such signs have been erected.

(Ord. No. 14(1989), § 2(15.76.110), 6-27-89; Ord. No. 05(1999), § 9, 5-18-99)

Exceptions & meaning →

Sec. 10.12.080. - Repairing vehicles on highway.

(a) A person shall not repair, or make any repairs, or add or install any part or accessory to or on any vehicle while the vehicle is upon any public highway or alley.

(b) The provisions of this section do not prohibit the driver of any vehicle which is disabled while upon any public highway or alley, to such extent that it is impossible to avoid stopping, from making or causing to be made the repairs necessary to enable such vehicle to be moved from the public highway or alley.

(Ord. No. 14(1989), § 2(15.76.120), 6-27-89)

Exceptions & meaning →

Sec. 10.12.090. - Washing vehicles in highway.

A person shall not dust, wipe, wash or otherwise clean, use or employ any method of dusting, wiping, washing or otherwise cleaning any vehicle or portion thereof while on any highway unless such vehicle is owned by or under the direct control or supervision, for purposes other than such wiping, washing, cleaning or dusting of the person doing any of the acts enumerated in this section.

(Ord. No. 14(1989), § 2(15.76.130), 6-27-89)

Exceptions & meaning →

Sec. 10.12.100. - Molesting of traffic counting devices.

Unless authorized by the city engineer, a person shall not move, molest, tamper with or damage in any way any traffic counting device which has been located within a highway or adjacent thereto by authority of the city engineer.

(Ord. No. 14(1989), § 2(15.76.140), 6-27-89)

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Sec. 10.12.110. - Injuring new pavement and painted markings.

When a barrier or sign is in place warning persons not to drive over or across any newly made pavement or any pavement under construction or any freshly painted markings upon any highway, a person shall not drive over such pavement or markings.

(Ord. No. 14(1989), § 2(15.76.150), 6-27-89)

Exceptions & meaning →

Sec. 10.12.120. - Flagman to regulate traffic when traffic control devices are…

Whenever the city engineer finds and determines that official traffic control devices are disabled or otherwise inoperable, he may regulate traffic by means of any person given temporary appointment for such duty. No person shall fail to obey any such traffic regulation when operating any vehicle.

(Ord. No. 14(1989), § 2(15.76.160), 6-27-89; Ord. No. 05(1999), § 10, 5-18-99)

Exceptions & meaning →

Sec. 10.12.130. - Flagmen at construction and maintenance areas.

Whenever the city engineer finds that the regulation of traffic is necessary at the site of road or street construction or maintenance, he may regulate traffic by means of persons authorized for such duty. No person shall fail to obey any such traffic regulation when operating any vehicle.

(Ord. No. 14(1989), § 2(15.76.170), 6-27-89; Ord. No. 05(1999), § 11, 5-18-99)

Exceptions & meaning →

Sec. 10.12.140. - Cleaning of sidewalks.

No person shall fail, refuse or neglect to keep the sidewalk adjacent to his house, place of business, or premises in a clean and neat condition, free of offensive matter of any kind or nature.

(Ord. No. 14(1989), § 2(15.76.180), 6-27-89)

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Sec. 10.12.150. - Littering highways or sidewalks.

No person shall throw, place, deposit or dump, or cause to be placed, deposited or dumped upon any highway or sidewalk, any bottle, can, garbage, rubbish or any substance likely to injure or damage traffic using the highway or sidewalk.

(Ord. No. 14(1989), § 2(15.76.190), 6-27-89)

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Sec. 10.12.160. - Operating noisy motor vehicles off highways.

(a) A person shall not operate any motor vehicle, including any motorcycle, trail bike, dune buggy, motor scooter or jeep, or the motor thereof, on any place other than a highway so as to disturb the peace or quiet of any neighborhood or person by noise, dust, smoke or fumes caused by such motor vehicle.

(b) This section does not apply to any act prohibited by Penal Code § 372, or prohibited or expressly permitted by any state statute.

(Ord. No. 14(1989), § 2(15.76.200), 6-27-89)

Exceptions & meaning →

Secs. 10.12.170—10.12.300. - Reserved.

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