Forncett SAM2 Sign - Is it effective?
We’ve been asked if the use of the sign actually has any effect on the speeding behaviour of drivers but this is difficult to prove conclusively without comparative data being obtained when the sign is not operating. However, the manufacturer advised that the sign could be put into ‘stealth’ mode which sounds sinister but simply means the vehicle numbers and speed data can continue to be logged without the speed display working. So when the sign was located on Mill Road in early June it was operated normally for the first week and in stealth mode for the second week. I won’t claim this to be a highly scientific exercise but the results are interesting. In the first week 48% of all vehicles were exceeding 35 mph and in the second week when the display was turned off this increased to 55%. So it does seem reasonable to infer that the sign does have a positive impact on driver behaviour — unfortunately this doesn’t disguise the fact that over the two weeks 78% of all drivers, some 7,459, exceeded the 30 mph limit with 219 exceeding 50 mph! This location remains the worst for speeding and clearly isn’t a particularly good place to be a pedestrian.
For details and tables of the results please























Most drivers will be aware of the SAM2 signs - they are vehicle activated and indicate clearly to the drivers of oncoming vehicles their speed in mph. If they are exceeding the speed limit a flashing warning sign will entreat them to ‘SLOW DOWN’. The actual vehicle speed will continue to be displayed up to 39 mph but above this no speed is indicated so as not to further encourage those drivers who might see a challenge in seeing how high a speed they can generate on the sign although the warning sign will continue to flash. This latest generation of sign also records the number of vehicle movements and the speed of any vehicle when it activates the sign. We now have recorded data from the initial three locations and the results are in the table below.






