Many European countries deploy weather-dependent speed limits, which are prone to misinterpretation by cameras.
While technologies such as the ISA can be lifesaving, cameras are unfortunately still fallible – and it is therefore essential to leverage content from the TomTom ADAS Map, thus being able to consistently deliver accurate speed limit information.
Benefits of TomTom ADAS Map Speed Limits
Since 2012, TomTom has sourced new map content for L0 to L2 driver-assistance levels. The TomTom ADAS Map gives vehicles insight of the road ahead, beyond the limited range of sensors.
The use of speed limits incorporated in the ADAS Map provides various advantages that cameras may be lacking.
Containing a database for more than 100 countries, the ADAS map includes verified and highly accurate road geometry such as curvature and gradient, lane information, traffic signs and speed limit information.
TomTom ADAS Map Speed Limits have attributes that indicate the allowed legal speed limit to a certain road segment and vehicle type.
In addition, ADAS Map Speed Limits also take into account the different types of speed limits, which would add more safety points for the NCAP vehicle criteria due to its more granular speed limit information.
The following types of speed limits are:
Explicit speed limits, which could be captured from posted speed limit signs.
Conditional speed limits that can be, for example, vehicle-specific, weather dependent, time-dependent and others.
Implicit speed limits which are present when, for example, entering an administrative area.
Fortunately, you don’t need a complete navigation map onboard for these ISA functions. TomTom map delivery services such as TomTom AutoStream can efficiently deliver a lightweight standalone map containing only the essential road and speed limit information. With these features, driving can be an even safer and more stress-free experience.
Who uses ADAS Map Speed Limits?
Due to the attributes that our TomTom ADAS Map provides, many automotive customers work with TomTom and already utilize these applications in Europe and North America.
For example, our ADAS Map is used by Daimler Trucks in the IPPC+ function. By knowing the new speed limit in advance, trucks are able to adapt its speed safely and carefully. This is much more efficient and safer than abruptly accelerating or decelerating a heavily loaded truck.
We also work with Alfa Romeo and many others to incorporate our ADAS Map content such as speed limits for ISA and similar functions.
From: TomTom Blog