All iSight speed warningsigns speed warning have an internal light compensation circuit to take account of the ambient light levels, automatically increasing in sunny condition and reducing at nighttime.

Working from radar, the sign can detect vehicles up to 100 metres away, the iSight sign gives advance warning of speed limits.

The iSight speed warning sign provides an important safety message in an elegant display.

Vehicle activated signs (VAS), are road side digital speed warning signs that display a message when they are approached by a vehicle exceeding the speed limit or going too fast for the type of road, especially when there is a hazard such as a bend or crossroads.