Abstract: Apparatus for recording traffic events occurring at a variety of vehicular traffic passageways, such apparatus including a portable housing unit having a keyboard presenting a predetermined pattern of pushbutton switches. A plurality of interchangeable display boards, each having different vehicular traffic patterns and symbolic traffic events displayed thereon, are selectively mounted over the keyboard, and each symbolic traffic even coincides with a particular pushbutton when so mounted. Choice of a suitable display board corresponding to a particular intersection and a desired type of traffic count allows a traffic checker to complete a traffic count by merely pressing a push-button switch corresponding to each observed traffic event and its location.