Find us on:Traffic Technology on Twitter Traffic Technology on LinkedIn

+44 (0) 1280 818656

English Dutch French German Italian Romanian Spanish Swedish
Contact Us
Please complete the form below with details of the product or service you are interested in and we’ll respond to you shortly.
SID Speed Indication Display - Covert Mode
Article Index
SID Speed Indication Display
SID Modes of operation
Safety Mode
Standard Mode
PSL Mode
Difference Mode
Covert Mode
Technical Data
All Pages


When used in this mode, SID becomes a covert monitoring device. With no display active the unit records the time and speed of approaching vehicles.  Data can subsequently be downloaded and compared to that of the active results.