SAN FRANCISCO (KRON) — Repairs to the Broadway Tunnel will “take a couple of days to complete,” according to San Francisco Public Works, after a truck struck the ceiling of the traffic artery Monday.

The incident delayed traffic for about three hours Monday afternoon. Video on Tuesday morning shows the right lane in the eastbound tunnel is closed as crews repair the ceiling.

The truck hit the eastbound part of the tunnel, and SFFD said there is no “structural instability.” Westbound traffic was not affected.

Public Works stated Tuesday via Twitter that the agency will keep one lane open during heavy commuter hours, but will fully close the eastbound part of the tunnel from approximately 9 a.m. to 1:30 p.m. until emergency repairs are completed.

“The emergency fix involves structural engineers from our Infrastructure Design & Construction Division who assessed the damage, & sheet metal workers, electricians, stationary engineers & general laborers from our Operations Division – all #EssentialWorkers working together,” tweets stated. “A day after a telescopic boom lift being towed atop a company’s flatbed truck damaged the ceiling of the Broadway Tunnel’s eastbound bore, our sheet metal worker Charles Reynolds removed broken tile to make the area safe for people who drive, walk & bike through the area.”

The delay happened after a bucket truck went through the tunnel with its bucket still partially raised.

“When it went through the areas with a lower clearance they hit the top, and they dragged the ceiling 100 feet taking the tile down with them,” San Francisco City Engineer Albert Ko said.

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Ko said superficial tiles were the only ones affected, keeping the structure intact. At another time, crews will return to shut down both lanes and take down a tile that is still dangling.

No injuries were reported.