Make:

I was astonished reading german in the RSS Feed. ^^
And your right, translated it's mesure speed by a webcam.

This is an interesting subject. My local university & state dept of trans have done work on this too: Traffic Video: The Use of Uncalibrated CCTV Cameras as Quantitative Speed Sensors. No published software, but some articles.

The instructions:
Recommended camera settings:
1. automatic brightness levels.
2. saturation to 0 (no color)
3. the camera must be able to do at least 25 fps.
4. only 320x240 resolution required.
5. automatically stops measuring after 3 seconds
6. Cars require a travel distance of at least 5m to measure, longer vehicles such as trucks and buses require a minimum travel distance of 10m to measure.
7. Camera must be perpendicular to the road.
8. a vehicle traveling 50km/h will require 14 ms to travel 10m.
9. depending on computer speed, the measure points will be polled about 100 to 200 times per second.

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