Traffic along Interstate 15 in northern San Diego County was brought to a standstill Monday evening after authorities temporarily shut down all northbound lanes near the Lilac Road Bridge while responding to a medical emergency involving an individual in distress.
The incident began shortly after 7:00 p.m. on Monday, June 29, 2026, when emergency dispatchers received reports of a person positioned on the Lilac Road Bridge, which crosses above Interstate 15 near Old Highway 395 in northern San Diego County, California. Out of concern for both the individual involved and motorists traveling below, the California Highway Patrol initiated a complete closure of the northbound lanes while southbound traffic was diverted at State Route 76.
The closure triggered a large multi-agency emergency response involving the California Highway Patrol (CHP), the San Diego County Sheriff’s Office, Cal Fire, local fire departments, emergency medical personnel, and specially trained crisis negotiators. Authorities also requested specialized rescue resources, including an inflatable rescue cushion, as crews prepared for multiple possible outcomes while negotiators worked to resolve the situation peacefully.
The extensive freeway closure quickly resulted in significant traffic congestion, with hundreds of vehicles backed up for miles during the evening commute. Officials urged motorists to remain patient and avoid attempting dangerous maneuvers such as driving on the shoulder or traveling against traffic, warning that such actions could endanger emergency responders and other drivers.
During the emergency response, first responders also assisted a vehicle carrying a woman who had gone into active labor. Emergency personnel escorted the vehicle safely through the closure area so she could receive prompt medical treatment, highlighting the coordinated efforts undertaken while the incident remained active.
At approximately 8:10 p.m., authorities briefly reopened the northbound lanes, allowing traffic to begin moving once again. However, the freeway was later closed a second time after crisis negotiators requested a quieter environment to continue communicating with the individual on the bridge. Concrete barriers and emergency vehicles were used to reduce freeway noise and create safer working conditions for negotiators.
As of the latest available information, officials have not released details regarding the identity, condition, or outcome involving the individual at the center of the incident. Authorities have also not disclosed the specific nature of the medical emergency, citing the sensitivity of the ongoing response.
Ongoing Investigation and Traffic Impact
Although no traffic collision was reported, the incident caused hours of disruption for commuters traveling through northern San Diego County. Authorities advised motorists to seek alternate routes while emergency operations remained underway and reminded drivers to follow instructions from law enforcement officers managing traffic around the scene.
The California Highway Patrol continues to coordinate with partner agencies as the incident is brought to a safe conclusion. Officials are expected to provide additional information once the response has concluded and the remaining roadway restrictions have been lifted.
For now, motorists traveling along Interstate 15 are encouraged to monitor traffic conditions before departing and expect delays in the area until all emergency operations have been completed.