first 2 days with the in cab work van camera. I ran it through its paces. it alerts to following too close speeding hard stops rolling through stop signs driver yawning following too close is based on speed and at 70 mph (112 kph) "too close" is anything within 1/4 mile (.40 kilometer). the only way to deal with this is driving the speed limit. everyone goes around me and as long as they're accelerating the camera doesn't alert. speeding is 10 over the limit