COOPERATIVE ADAPTIVE CRUISE CONTROL (CACC)

Description

The CACC concept envisions drivers sharing vehicle control with an automated system that includes pervasive vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communications. Using dedicated short-range communications (DSRC), vehicles communicate directly with other nearby equipped vehicles to coordinate and adjust longitudinal control through throttle and brake activations. These automated responses occur much more quickly than humanly possible, allowing equipped vehicles to safely travel closer together and increasing the road capacity

Objectives

C-ACC allows for short-distance automatic vehicle following, using inter-vehicle wireless communication, thereby regulating traffic flow and reducing perturbations while being used as a platoon.

Inputs

RADAR Sensors
ACC with its sensor measurements to determine the range to the vehicle in front
Preceding vehicle's acceleration data

Benefits

Decreasing the following distances between vehicles to allow more vehicles to fit in a lane
Increasing the flow's string stability (use case: platooning)
The attenuation of traffic disturbances in the upstream direction, which would reduce traffic jams and increase overall average speed
Highway environment is a more fuel-efficient state of operation

CACC

Developed by

Project Status

Communication

Protocol

TNO,TomTom, Peak Traffic

Demonstrated

IEEE 802.11p CALM FAST, Cellular Communication (4G LTE, 3G, HSDPA, GPRS)

Project Outcomes

A demo of CACC on A10, Amsterdam was shown in November 2013

Limitations

Concern over privacy of data
Responsibility in the case of an accident when a CACC system is engaged

Scorecard

Refer to “Evaluation” for details on scoring.