People v. Persons

The defendant is charged with speeding, and the sole evidence produced by the People concerning his speed was that derived from the use of a new device known as Vascar (visual average speed computer recorder). This instrument is supposed to measure the distance a vehicle travels and the time which it takes the vehicle to cover that distance. By using the mathematical formula of speed equals distance divided by time, the unit computes the average speed of a vehicle over the distance measured and visually displays that speed to the operator.

Vascar’s accuracy and reliability has not yet been…