San Diego County agencies plan expanded DUI enforcement for St. Patrick’s Day overnight, March 17

Overnight patrols and checkpoints planned as St. Patrick’s Day celebrations increase impaired-driving risk

Law-enforcement agencies across San Diego County are preparing for expanded impaired-driving enforcement on St. Patrick’s Day, Tuesday, March 17, 2026, with officials warning that late-night celebrations historically coincide with higher crash risk.

The San Diego County Sheriff’s Office has scheduled an overnight enforcement window beginning at 6 p.m. Tuesday and continuing until 6 a.m. Wednesday. The plan includes increased impaired-driving patrols across areas served by the Sheriff’s Office, with deputies looking for drivers suspected of being under the influence of alcohol, cannabis or other drugs.

Separate from the countywide patrol emphasis, the Sheriff’s Office has also used checkpoints around the St. Patrick’s Day period in prior years, including operations in Lemon Grove and other contract cities. Checkpoints in California are typically announced in advance and are set at undisclosed locations selected based on prior DUI crashes and arrest history.

How DUI patrols differ from checkpoints

DUI saturation patrols and sobriety checkpoints are two distinct enforcement tools. Patrols rely on officers actively watching for driving behaviors associated with impairment, then conducting stops when legal thresholds are met. Checkpoints involve briefly screening vehicles at a fixed location using a pre-planned format intended to deter impaired driving and identify unsafe drivers.

• Saturation patrols: Mobile, higher-visibility patrol presence; stops are based on observed violations or impairment indicators.
• Checkpoints: Fixed-location screening; designed to deter impaired driving and can also identify unlicensed drivers.

Why St. Patrick’s Day draws enforcement attention

National traffic-safety data show that nighttime hours during the St. Patrick’s Day holiday period carry elevated risk for alcohol-impaired driving. Traffic-safety messaging tied to the holiday routinely emphasizes that impairment is not limited to alcohol and can include cannabis and certain prescription or over-the-counter medications that can affect driving ability.

In San Diego, local agencies have also documented increased DUI enforcement activity tied to holiday periods and major events. Within the City of San Diego, the Police Department has conducted DUI and driver’s-license checkpoints funded through traffic-safety grants and has publicly stated that deterrence and prevention are central objectives of checkpoint operations.

What drivers should expect Tuesday night

Residents traveling Tuesday evening and overnight should anticipate more patrol vehicles on major corridors and in nightlife areas, particularly near closing-time hours. Officials have consistently urged celebrants to plan transportation in advance and avoid driving after consuming alcohol or drugs.

St. Patrick’s Day enforcement focuses on identifying and deterring alcohol- and drug-impaired driving during peak nighttime risk hours.

St. Patrick’s Day falls on a Tuesday this year, but enforcement is designed to cover late-night activity that extends into early Wednesday. Motorists are advised to allow extra travel time, remain alert for traffic stops and checkpoint activity, and ensure any designated driver is sober.