Intelligent Speed Adaptation (ISA)
Intelligent Speed Adaptation (ISA) is a system that provides, within the vehicle, information on the speed limit for the road currently being travelled on. That information can be used to display the current speed limit inside the vehicle and warn the driver when he or she is speeding (i.e. Advisory ISA); it can be linked to the vehicle engine and perhaps brakes to curtail speed to the speed limit for the road while allowing the driver to override the system (i.e. Voluntary ISA); or it can be linked to engine and brakes without the possibility of an override (i.e. Mandatory or Non-Overridable ISA).
The technology is of interest because of the known relationship between speed and risk of an accident and also because of the relationship between speed and injury severity in an accident.
The earlier External Vehicle Speed Control project demonstrated the viability of ISA technology. The follow up Intelligent Speed Adaptation project was commissioned to investigate how drivers would behave when using a Voluntary ISA in everyday car driving.
Important issues covered were how different types of driver (younger/older, male/female, habitual speeder/non-speeder) would be affected in terms of speed choice by use of the system, how their attitudes to the system would evolve over time, and whether they would revert to their pre-ISA speeding behaviour once the system was switched off.
Other work in the project has examined the feasibility of building a motorcycle with ISA and has investigated the impact of ISA on the operation of a truck used in a short-haul delivery operation. Finally the project has estimated the potential impact of ISA on future accidents, and has estimated the overall future benefit-to-cost ratios from ISA introduction.
The technology is of interest because of the known relationship between speed and risk of an accident and also because of the relationship between speed and injury severity in an accident.
The earlier External Vehicle Speed Control project demonstrated the viability of ISA technology. The follow up Intelligent Speed Adaptation project was commissioned to investigate how drivers would behave when using a Voluntary ISA in everyday car driving.
Important issues covered were how different types of driver (younger/older, male/female, habitual speeder/non-speeder) would be affected in terms of speed choice by use of the system, how their attitudes to the system would evolve over time, and whether they would revert to their pre-ISA speeding behaviour once the system was switched off.
Other work in the project has examined the feasibility of building a motorcycle with ISA and has investigated the impact of ISA on the operation of a truck used in a short-haul delivery operation. Finally the project has estimated the potential impact of ISA on future accidents, and has estimated the overall future benefit-to-cost ratios from ISA introduction.
Intelligent speed adaptation - executive summary (1 Mb)
Executive summary of the project results.
- Published:
- 15 September 2008
Intelligent speed adaptation - full report (4 Mb)
Full report of the project results.
- Published:
- 15 September 2008
Intelligent speed adaptation - Implementation Scenarios (1 Mb)
Different types of ISA evaluated separately.
- Published:
- 15 September 2008
Intelligent speed adaptation - Simulator experiments (1 Mb)
Results of simulator experiments.
- Published:
- 15 September 2008
Intelligent speed adaptation - Truck trial (1 Mb)
Results of truck trial.
- Published:
- 15 September 2008
Intelligent speed adaptation - Motorcycle trial (1 Mb)
Results of motorcycle trial.
- Published:
- 15 September 2008
Intelligent speed adaptation - Overall field trial (2 Mb)
Results of overall field trial.
- Published:
- 15 September 2008
Intelligent speed adaptation - Field trial 1 (2 Mb)
First field trial results.
- Published:
- 15 September 2008
Intelligent speed adaptation - Field trial 2 (998 kb)
Second field trial results.
- Published:
- 15 September 2008
Intelligent speed adaptation - Field trial 3 (1 Mb)
Third field trial results.
- Published:
- 15 September 2008
Intelligent speed adaptation - Field trial 4 (2 Mb)
Fourth field trial results.
- Published:
- 15 September 2008
External vehicle speed control
Previous research conducted by DfT. The aim of the project was to review the possible introduction of an automatic system to limit the top speed of road vehicles.
