About the author →
Ontario's DUI enforcement landscape is shaped by its unique identity as the logistics and aviation hub of Southern California. The city experiences constant overnight freeway traffic on I-10 and I-15 (the primary east-west and north-south arterials connecting the San Gabriel Valley, Los Angeles, and the High Desert to the Port of Long Beach and inland distribution centers). Ontario International Airport—a major cargo facility with 24-hour operations—draws courier vehicles, commercial truck traffic, and service workers on unpredictable schedules. The city's commercial entertainment zones (Ontario Mills, the Toyota Arena, restaurants and bars along Euclid Avenue and in the Ontario Ranch development south of the airport) create local foot traffic and hospitality-related DUI scenarios. Together, these factors drive both Ontario Police Department checkpoints and California Highway Patrol freeway enforcement operations, making DUI arrests a routine part of the enforcement calendar.
How DUIs are policed in Ontario
Ontario has its own Ontario Police Department, which conducts DUI checkpoints, saturation patrols, and local-area enforcement. The department operates independently (not contracted to the San Bernardino County Sheriff) and runs checkpoint programs funded partly by California Office of Traffic Safety (OTS) grants. The California Highway Patrol's Inland Division patrols the I-10 and I-15 corridors running through Ontario, conducting freeway DUI enforcement, checkpoints, and special operations targeting impaired drivers on high-volume commercial corridors.
OTS Ranking and DUI Enforcement Volume: According to California's Office of Traffic Safety, Ontario's DUI arrest rate and alcohol-involved collision figures among comparable West Valley and Inland Empire cities will be verified before publication. Ontario's position as a 24-hour logistics and aviation hub means DUI enforcement is conducted across all hours, not just peak evening periods. The combination of overnight freeway traffic, warehouse shift schedules, and airport operations creates a unique enforcement environment compared to traditional residential or entertainment-focused communities.
Ontario Police Department Checkpoints: The Ontario Police Department conducts regular DUI and driver's license checkpoints throughout the city, particularly on major arterials serving the airport, distribution centers, and commercial entertainment zones. Checkpoints target locations with documented DUI collision history and are typically announced in advance via press release. The department also conducts saturation patrols on I-10 on-ramps and off-ramps, Euclid Avenue, and access roads to Ontario International Airport, especially during nighttime hours when impaired-driving risk is highest.
CHP Inland Division — Rancho Cucamonga Area Office: The California Highway Patrol's Inland Division covers all of San Bernardino County, with area offices in San Bernardino, Rancho Cucamonga, Victorville, and Barstow. CHP patrols the I-10 and I-15 freeways running through Ontario with regular DUI enforcement operations, checkpoints, and special enforcement unit (SEU) activities. The CHP's overnight and early-morning enforcement on the commercial corridors connecting the airport and distribution centers is particularly active, given the round-the-clock courier and warehouse traffic moving through the interchange.
Where an Ontario DUI case is heard
Ontario does not prosecute DUI cases through its own city attorney. Whether the Ontario Police Department made the stop on a city street or the CHP made it on I-10 or I-15, the case is filed at the Rancho Cucamonga Courthouse, the West Valley criminal court that also handles Fontana, Rialto, and Upland filings, and the San Bernardino County District Attorney's Office prosecutes every one of them. Because Ontario International Airport and the logistics corridor around it run around the clock, arrests out of Ontario come from day shift, night shift, and the overnight hours alike, but they all funnel into the same courthouse calendar regardless of when the stop happened. Ron appears with you at each hearing there and manages the separate ten day DMV clock alongside the criminal case so neither deadline gets missed.
Booking and getting your car out in Ontario
Ontario Police Department does not operate a long term jail inside the city. Adults arrested for DUI are transported to a San Bernardino County Sheriff's facility for booking, and for West Valley cities like Ontario that is typically the West Valley Detention Center in Rancho Cucamonga, which the Sheriff's Department describes as receiving arrestees from many different agencies across the county. Your vehicle is a separate matter from your custody status. Ontario PD's main station, at 2500 South Archibald Avenue, is open weekdays from 7 a.m. to 6 p.m. and weekend mornings from 9 a.m. to noon, and its Property and Evidence function handles released property, though towed vehicles are often held at a contracted storage yard rather than at the police station itself. Bring a valid driver's license, current registration, and proof that the underlying reason for the tow, such as a suspended license, has been addressed before you go to retrieve the car, since requirements can shift depending on why it was towed.
Ontario transit and the DMV during a suspension
Ontario is unusual among San Bernardino County cities in having its own Metrolink stop: the Ontario-East station on the Riverside Line, the closest rail station to Ontario International Airport, with direct service toward Riverside and, by transfer, Los Angeles. Omnitrans buses also run throughout the city as part of the agency's 15-city, roughly 480-square-mile service area, and the agency's West Valley Connector project, now under construction, is meant to add frequent rapid bus service linking Ontario, Montclair, Rancho Cucamonga, and Pomona. Metrolink's own published directions for reaching the airport by train route riders through the Rancho Cucamonga station instead of Ontario-East, with a connecting ONT Connect shuttle that runs roughly every 35 to 60 minutes between the station and the terminals. For DMV business beyond the ten day hearing, such as reinstating a suspended license once a suspension ends, the closest full service DMV field office to Ontario is in Rancho Cucamonga, approximately 10 miles away, since Ontario itself does not have a state-run field office.
Where will my Ontario DUI be heard?
Does the Ontario Police Department run DUI checkpoints?
Why is DUI enforcement so active on Ontario's freeways?
Does the CHP patrol Ontario's freeways for DUI?
Can Ron Chini defend my Ontario DUI from Irvine?
← Back to San Bernardino County DUI Defense
Ron defends DUI cases across Southern California from his Irvine office — and works directly with you, not a call center.
Learn more about Ron Chini →