A clamp assembly (100) for a handlebar of a vehicle comprises a first clamp body (1a) and a second clamp body (1b). The first clamp body (1a) and the second clamp body (1b) are pivotally mounted around the handlebar. The first clamp body and the second clamp body are hinged at one end using a hinge pin (11). A resilient means (8) is mounted at the hinge pin (11) and adapted to be coupled with the first clamp body (1a) and the second clamp body (1b). The resilient means (8) is adapted to provide a torsional force for moving the first and second clamp body (1a, 1b) from a closed position to an open position of the clamp assembly. The clamp assembly is adapted with a switch assembly. A stopper pin (9) is configured on the first clamp body (1a) to secure the switch assembly on the clamp assembly (100).