A traffic collision involving a semi truck occurred today at the Third Avenue on-ramp to southbound U.S. Highway 101 in San Mateo, CA, causing significant traffic disruptions. The incident was reported around 2:11 PM when the semi truck became immobilized on the on-ramp, blocking access to the highway.
Emergency services quickly responded to the scene, implementing traffic control measures to manage the situation. The on-ramp was closed, leading to delays and congestion for motorists in the area. A signal alert was issued at 2:37 PM, warning drivers of the blockage and the potential for extended delays.
Multiple units arrived on-site to assist with traffic management, and a tow truck was requested to clear the semi truck and a telephone pole that was involved in the collision. The on-ramp remained closed for several hours as emergency responders worked to clear the roadway and assess the situation.
By 4:20 PM, all lanes were confirmed to be reopened, allowing traffic to resume normal flow. However, motorists experienced backups and delays during the afternoon commute as the area cleared. Drivers are advised to remain cautious and aware of ongoing road conditions in the vicinity.