A bad crash involving a bicycle in the East Johnson Street construction zone Thursday night. A 26 year old Madison man, is in critical condition with a severe head injury. He wasn't wearing a helmet.

Witnesses told police the bicyclist was speeding past motor vehicles and ran a red light. The accident happened in the 700 block of East Johnson, just after 9:30 p.m.

Police say a front fork had snapped off the bicycle, potentially causing the crash.