Intelligent Speed Adaptation

by Venkata Kottapalli, Clemson Automotive Engineering Graduate Student

Basic Description

Intelligent Speed Adaptation (ISA), also known as Intelligent Speed Assistance, is a system that constantly monitors the local speed limit and compares it to the vehicle speed. The system may simply warn the driver, or it may intervene to reduce the speed of the vehicle.

ISA uses information about the road on which the vehicle travels to make decisions about what the safe speed of the vehicle should be. ISA systems may determine the speed limit based on GPS location mapping or by optically reading posted speed limit signs. The purpose of ISA is to assist the driver in staying within the lawful speed limit at all times, particularly as they pass through different speed zones.

Passive ISA systems warn the driver by indicating the speed limit on the road and the vehicle speed when the vehicle travels in the excess of speed limits. Warnings are displayed in the form of visual or auditory warnings or tactile cues such as vibration of the accelerator pedal. Active ISA systems automatically correct the speed of the vehicle to confirm to the speed limit by manipulating the throttle and/or braking systems.

Sensors

GPS Receiver, Wireless Transceiver, Vehicle Speed Sensor, Gyroscope, Accelerometer, Video camera

Actuators

Display, Throttle

Data Communications

Control Unit Communication: Typically Control Area Network (CAN) Bus.
GPS or Infrastructure-to-vehicle wireless communications.

Manufacturers

Skoda, Volvo, Renault

For More Information

[1] Intelligent Speed Adaptation, Wikipedia.

[2] Intelligent Speed Adaptation - Carsguide, YouTube, July 7, 2008.

[3] Monitored Intelligent Car Speed Adaptation (MISA) System, O. Bamasak et al., IJECS, June 2011.

[4] UK tests 'Intelligent Speed Adaptation' tech that Automatically Regulates Vehicle Speeds, Autoblog.com, May 15, 2009.

[5] In-Vehicle Intelligent Speed Advisory Systems, NHTSA website. (pdf)

[6] An Energy and Emissions Impact Evaluation of Intelligent Speed Adaptation, O. Servin et al., Intelligent Transportation Systems Conference, Sep. 2006. (pdf)

[7] Intelligent Speed Assistance - Myths and Reality, European Transport Safety Council flyer, 2006. (pdf)

[8] Dynamic Data update for Intelligent Speed Adaptation(ISA) System, B. Karthikeyan and M. Tamileniyan, Journal of Computer Applications, Dec. 2010.

[9] Intelligent Speed Adaptation System with Hybrid Algorithm, S.Wankhede et al., Journal of Comp. Sci. & Network Security, Jan 2011.