CP3 version 3003
76
Cars driving bumper-to-bumper
This problem can be minimised by using optical sensors which are fast and precise enough to detect the
small gap between the cars. However, even if this option is used, detection can still be inaccurate, so
therefore an access barrier or a speed bump between sensor 1 and sensor 2 might be the best solution to
achieve optimum accuracy.
One-sensor DPO
A one-sensor solution at the entrance and exit can make a correct detection/counting.
A one-sensor solution could look like this:
This solution is only recommendable if the direction of the cars is entirely predictable, for instance if the
entrances and exits are totally divided so that cars are not able to go in the wrong direction.