Long range barrier sensor

[Tang]

Hi

I'm looking for a long range (2.5-3 meters) barrier sensor and I can't find something interesting
Maybe you can help me

I need to detect the car position in my garage and turn on a light to not bump the other car.
My idea is to install 3 or 4 sensors on ceiling to detect which car is the first and with a little of intelligence turns on first or second light.
It's not a problem to install reflector on the ground.
The idea is similar to parking build but it can't be applied in my configuration.

Thanks for your help

[mfalkvidd]

The solutions discussed in http://forum.mysensors.org/topic/3257/simple-detector-that-detects-breaking-of-a-line/ might be something you can use?