Menlo Park police are investigating a collision that left a bicyclist with life-threatening injuries Monday morning.
The crash, which occurred around 8:23 a.m. at Bayfront Expressway and Marsh Road on Nov. 18, left the westbound traffic lanes closed for about six hours while investigators finished gathering information.
The driver, a 33-year-old woman who lives in Union City, remained at the scene and did not appear to be under the influence of any drugs, police said.
The 33-year-old male bicyclist, a Menlo Park resident, was taken to Stanford Hospital. On Monday afternoon police spokeswoman Nicole Acker said he remains in critical condition and had undergone surgery.
Further details were not available and no fault has been assigned yet, according to Ms. Acker. Police ask that anyone with information about the accident call investigators at 330-6300.