This paper shows the design and development of a braking mechanism remotely controlled via pneumatic elements. The objective of the mechanism is to stop test vehicles during crash test trials, respecting the protocol governing these tests by Global Research Council for automobile repair (RCAR). The research for the construction of such a mechanism covered topics like impact and braking dynamics, automotive crashing tests, pneumatics and testing mechanism developed in the center of experimentation and road safety (CESVI) Colombia where it became necessary to build it.