SF Muni Manages Route 31 After Balboa Collision

Traffic collision at Balboa and 20th Avenue causes delays on Route 31 in both directions

2026-03-10, Moovit News Team

Route 31 Faces Delays at Balboa and 20th

San Francisco Muni's Route 31 is experiencing delays in both directions due to a traffic collision at Balboa Street and 20th Avenue, transit officials said Monday. The incident, which doesn't involve Muni vehicles, is affecting inbound and outbound buses traveling through the intersection. Riders should expect longer travel times, though officials haven't said how long delays will last.
San Francisco Muni bus on city street with traffic in background. Alt text: San Francisco Muni Route 31 bus navigating urban street traffic. Composition: Side angle showing full bus with street context, emphasizing urban transit environment.

Non-Muni Collision Blocks Key Corridor

The collision involves private vehicles and occurred at one of the busier intersections along the Route 31 corridor, according to the transit agency. Officials said the incident is blocking traffic flow through the area, creating cascading delays for buses that must navigate around the scene. Specific details about the collision weren't available by publication time. Transit agencies typically experience service disruptions when traffic incidents occur along bus routes, as vehicles must share road space with private cars and can't bypass blocked intersections like rail systems.

Both Directions See Service Impacts

The delays are affecting Route 31 buses traveling in both inbound and outbound directions through the Balboa and 20th Avenue intersection, transit officials confirmed. Officials didn't provide specific delay times or say how many buses are affected by the disruption. The agency hasn't said whether additional buses will be deployed to help manage passenger loads during the delays. Route 31 typically serves riders traveling between the Richmond District and other parts of San Francisco, though ridership figures for the route weren't immediately available.
Traffic intersection in San Francisco with buses and vehicles. Alt text: San Francisco street intersection showing Muni bus in mixed traffic conditions. Composition: Wide angle showing intersection with multiple vehicles, emphasizing traffic congestion affecting transit.

Timeline for Normal Service Unclear

Officials haven't provided an estimated time for when normal service will resume on Route 31. The transit agency said it's monitoring the situation, but whether the collision scene has been cleared wasn't available by publication time. Muni typically restores regular service once traffic incidents are resolved and vehicles can move freely through affected areas.

Riders Advised to Plan Extra Time

Passengers using Route 31 should allow extra travel time and consider alternative routes if possible, according to the transit agency. Officials said riders can monitor Muni channels for updates on service restoration, though specific information about alternative routes wasn't provided. Moovit provides real-time updates for San Francisco Muni routes, helping riders track bus locations and adjust travel plans during service disruptions.