The Thermotor Interactive Speed Indicating Sign (ISIS) is a mobile advisory LED compact sign.
It is used to remind vehicle drivers of their actual speed, by the use of an active 200mm speed
The programmable Variable Message Sign (VMS) text is used to inform drivers that they may
be committing other offences. The interactive elements of the sign are set by the operator
normally selected from a pre-programmed list. Messages such as "SLOW DOWN" and
"THANK YOU" are typical on speed indicating signs but the ISIS offers the refinement of
additional messages such as "SEAT BELT", "MOBILE PHONE", "£60 FINE" or "TURN
LIGHTS ON". These can be used to educate drivers without stopping the traffic flow. These
messages are activated by the use of a remote control unit.
The ISIS also interfaces to police enforcement speed guns.