What is the default speed limit if no sign is posted?

Default limits follow California law and local posted rules; specific default values are set by state code and local engineering orders and are not consolidated on the cited LADOT page.

What BAC defines a DUI in Los Angeles?

California Vehicle Code §23152 defines impaired driving; a BAC of 0.08% or higher is charged under state law for typical adult drivers; see VC §23152 for statutory language.

Who do I contact to report unsafe speeds or dangerous signage?

Contact the Los Angeles Department of Transportation or local council office; LADOT maintains traffic management contacts and complaint pathways.

Los Angeles Speed Limits & DUI Penalties

Transportation California 3 Minutes Read · published February 02, 2026

Los Angeles, California drivers must follow both posted speed limits and state DUI law. This guide explains how local authorities set and enforce speed limits, how DUI offences are charged under California law, who enforces these rules in the city, and the practical steps drivers can take after a stop, ticket, or arrest. It consolidates official city and state sources so you can find the controlling rules, the enforcement offices to contact, and the application or appeal steps to protect your driving record.

Penalties & Enforcement

Speed limits in Los Angeles are managed through local traffic engineering and posting procedures; the City of Los Angeles Department of Transportation maintains policies and programs for setting and reviewing limits LADOT speed management^[1]. Legal DUI offenses are defined in the California Vehicle Code; the primary statute is Vehicle Code §23152 for driving under the influence Cal. Veh. Code §23152^[3]. The Los Angeles Municipal Code contains local traffic and citation procedures where applicable Los Angeles Municipal Code^[2].

Fines: amounts vary by offense and court; specific dollar amounts are not specified on the cited municipal or LADOT pages and are determined by state law and court fees (LADOT)^[1].
DUI fines and assessments: the Vehicle Code defines the offense but the cited section does not list a single consolidated fine schedule; see the California Vehicle Code link for the statutory offense language (VC §23152)^[3].
Escalation: penalties escalate for prior convictions, high BAC, injury, or refusal to submit to tests; specific ranges are not specified on the cited municipal pages and are controlled by state law (LAMC)^[2].
Non-monetary sanctions: license suspension or revocation, ignition interlock device orders, probation, and possible custody are imposed under state statutes and DMV administrative actions; see Vehicle Code and DMV for procedures (VC §23152)^[3].
Enforcers: LAPD and allied agencies enforce speed and DUI laws in Los Angeles; LADOT manages speed administration and signage policies. To report or ask about enforcement, contact the applicable department listed in Resources below.

Local speed limits are set through engineering practices and posted signage; unposted roadways follow state default rules.

Appeals, Review, and Time Limits

Citation appeals and traffic court: follow the instructions on the ticket for how to contest; specific deadlines appear on the citation itself and are governed by court rules, not detailed on the cited municipal pages.
Administrative license actions: DMV administrative suspension procedures and timelines apply after DUI arrests; consult the DMV for exact notice periods and hearing request deadlines.

If arrested or cited, act quickly to note deadlines on the citation and request hearings within the stated timeframes.

Common Violations

Exceeding posted speed limits — commonly enforced on arterials and near schools.
Driving under the influence of alcohol or drugs as defined by Vehicle Code §23152.
Refusal to submit to chemical testing when lawfully requested.

Applications & Forms

Traffic citation contest / request for trial: use the form or procedure shown on the citation; no single city form is published for all traffic contests on the cited municipal pages.
DMV hearing request for administrative license suspension: forms and instructions are provided by the California DMV (see Resources).

FAQ

What is the default speed limit if no sign is posted?: Default limits follow California law and local posted rules; specific default values are set by state code and local engineering orders and are not consolidated on the cited LADOT page.
What BAC defines a DUI in Los Angeles?: California Vehicle Code §23152 defines impaired driving; a BAC of 0.08% or higher is charged under state law for typical adult drivers; see VC §23152 for statutory language (VC §23152)^[3].
Who do I contact to report unsafe speeds or dangerous signage?: Contact the Los Angeles Department of Transportation or local council office; LADOT maintains traffic management contacts and complaint pathways.

How-To

If stopped for a speed or DUI-related reason, remain calm, provide requested license and registration, and comply with lawful officer instructions.
Ask for the citation or notice, read deadlines carefully, and note the court or DMV hearing deadlines printed on the documents.
To contest a citation, follow instructions on the ticket to appear in traffic court or request a trial by written declaration where available.
For DUI administrative license issues, immediately contact the California DMV and request a hearing if you wish to contest suspension.

Missing a deadline to request a hearing can forfeit administrative remedies; check citation and DMV notices immediately.

Key Takeaways

Los Angeles uses LADOT procedures and state law together to manage speed limits and DUI enforcement.
Citations include deadlines—act promptly to request hearings or contest charges.
DUI offenses are charged under California Vehicle Code §23152 and may trigger DMV actions.