Intelligent Speed Assistance (ISA) is a vehicle safety feature that informs drivers of the current speed limit and, when needed, acts as a speed limiter – automatically reducing a vehicle’s speed by limiting engine power. The technology is estimated to reduce accidents by 30% and deaths by 20%.

To make driving safer, EU legislation made ISA mandatory for all new vehicles starting in 2022, and mandatory for all existing carlines per 2024. The legislation applies to all European cars, vans, trucks and buses. Both the global New Car Assessment Program (NCAP) and Euro NCAP protocol will also award vehicles with ISA tech higher safety ratings. So how can automakers best adopt the new safety technologies?

Many speed limit types are nearly impossible for cameras to recognize, such as speed limits conditional on time of day, weather and vehicle type, and speed limits with sub-plates and implicit speed limits (for example, entering a city boundary). TomTom map data provides highly accurate, verified content for all speed limit types in 100+ countries.

TomTom ADAS Map speed limits are collected by TomTom survey vehicles and maintained with crowdsourced data. We attach these speed limits to specific road segments, also indicating specific validity if it is a conditional speed limit. Internal TomTom audits and benchmarks against competition confirm the leading quality of our speed limit data.