This document contains the basic control strategy, minimum functionality requirements, basic driver
interface elements, minimum requirements for diagnostics and reaction to failure, and performance
test procedures for Adaptive Cruise Control (ACC) systems.
ACC systems are realised as either Full Speed Range Adaptive Cruise Control (FSRA) systems or Limited
Speed Range Adaptive Cruise Control (LSRA) systems. LSRA systems are further distinguished into
two types, requiring manual or automatic clutch. Adaptive Cruise Control is fundamentally intended
to provide longitudinal control of equipped vehicles while travelling on highways (roads where nonmotorized
vehicles and pedestrians are prohibited) under free-flowing and for FSRA-type systems
also for congested traffic conditions. ACC can be augmented with other capabilities, such as forward
obstacle warning. For FSRA-type systems the system will attempt to stop behind an already tracked
vehicle within its limited deceleration capabilities and will be able to start again after the driver has
input a request to the system to resume the journey from standstill. The system is not required to react
to stationary or slow moving objects