Autonomous Emergency Braking Systems and Forward Collision Warnings (AEB-FCW) are progressively entering European market. Due to cost constraints, the more efficient (expensive) systems are first implemented in Premium brands' vehicles where the impact of the cost of the system on the overall cost of the vehicle is smaller than for Standard brands' vehicles. For those models less expensive systems are implemented but they usually cover less scenarios. It induces a largely smaller benefit for the road safety even if they have higher market share.

To increase the benefit on road safety, it is needed to develop less expensive AEB-FCW aimed to cover the same scenarios as the more expensive systems. The objective of this study is to demonstrate our ability to design a more affordable FCW-AEB with high efficiency and comparable to the one equipping Premium brands' vehicles using two sensors (camera and radar)

To compare the performances achieved by these two AEB, evaluations have been performed on the same car model by UTAC following the Euro NCAP 2016 protocols (AEB City, AEB Inter Urban, AEB Vulnerable Road Users). These protocols are the existing ones in use at the moment which covers the largest amount of accident scenarios.

They include following scenarios:​

• Car to car rear stationary,
• car to car rear moving,
• car to car braking,
• car to adult pedestrian crossing walking,
• car to adult pedestrian crossing running,
• and car to initially obscured child crossing walking.

Both systems have been developed following the same functional safety rules and aiming to have the same level of safety. The braking profile has been adapted to do so.

At the end, PSA defined a logic that provides a similar performance for pedestrian targets, and a slightly different one for car target but with a high cost difference.

This comparison has been done using the existing test protocols for AEB-FCW systems. But we have to know that it doesn't cover 100% of the field scenarios. Night scenarios for example have not been evaluated. But we can assume that if the low beam is on, the pedestrian will still be detected. Longitudinal scenarios for pedestrian have also not been performed but also there, the performance difference should be low.

This study has showed that it is possible to develop a relatively cheaper AEB-FCW with the same functional safety level, a mostly similar performance and with a much higher market share. This will increase the global level of road safety.