A laser radar apparatus for producing a pulse modulated transmitted light beam and receiving reflected light beams from road mounted retroreflectors. In the preferred embodiment, a floodlight beam illuminates a portion of a roadway from 20 to 150 in front of a vehicle. Reflected beams from retroreflectors mounted in the roadway are received by the radar unit which calculates distance D and angle .theta. between the laser radar apparatus and each retroreflector. Distance D is calculated by measuring the propagation delay of the pulse modulated light beam. Angle .theta. data is indicated by measuring where on a receiver photodiode array the light beam is incident.