ISA: Large-scale trials of Intelligent Speed Adaptation in Sweden
|ISA: Large-scale trials of Intelligent Speed Adaptation in Sweden|
|Type: Field operational test|
|Tested system/service: Intelligent Speed Adaptation|
|Countries: Sweden||? test users|
|5 partners||5000 vehicles|
|Active from 1999 to 2001|
|Swedish Transport Administration|
|Data catalogue||Tools catalogue|
|Data sets used in this FOT:
||The following tools|
were used in this FOT:
During the period 1999-2002 the Swedish National Road Administration conducted a comprehensive road information project which included a large-scale trial involving Intelligent Speed Adaptation in urban areas. Several thousand vehicles have been equipped with voluntary, supportive and informative systems to help keep drivers from exceeding the speed limit.
The systems were tested in Borlänge, Lidköping, Lund and Umeå, where the local authorities were responsible for running the trials in their respective municipalities. Over the three years of the project, the Swedish National Road Administration provided SEK 75 million in funding, and was also responsible for the overall co-ordination of the technology involved, as well as for evaluating the comparative advantages and disadvantages of the various systems.
1999 saw the planning of how the trial would be implemented and evaluated and in 2000 the systems started being installed in the vehicles. Most of the actual field trials were carried out in 2001. All the data collected trial was compiled and analysed in 2002
Details of Field Operational Test
Start date and duration of FOT execution
The systems were tested in Sweden, in Borlänge, Lidköping, Lund and Umeå, where the local authorities were responsible for running the trials in their respective municipalities.
The ISA trial was conducted primarily in built-up areas with 50 or 30 km/h speed limits, but even a few stretches where the speed is 70, 90 and 110 km/h were included.
The aim of the trial, which was conducted jointly by the Swedish National Road Administration and four Swedish municipalities, was to learn more about:
- driver attitudes and how they use the systems
- the impact on road safety and the environment
- the integration of the systems in vehicles
- the prospects for Intelligent Transport Systems (ITS) on a large scale.
The main findings were:
- Better road safety without increasing travel time
- If everyone had ISA, there could be 20% fewer road injuries in urban areas
- High acceptance of ISA, and after the trial most test drivers were of the opinion that ISA should be compulsory in urban areas
- ISA vehicles were found to have a positive influence on surrounding traffic
- Minor differences between the systems, with an average speed reduction of 3 4 km/h on stretches between intersections
- The systems must be improved to become more attractive.
Summary, type of funding and budget
The Swedish National Road Administration provided SEK 75 million (~7.5Mio EUR) in funding
Cooperation partners and contact persons
- Public Authorities: Swedish National Road Administration, local authorities of Borlänge, Lidköping, Lund and Umeå
- Vehicle Manufacturer:
- Research Institutes:
- Others (specify):
Main Contact person
Johnny Svedlund Swedish Transport Administration Borlänge Tel.: +46 243 75079 email@example.com
Applications and equipment
Different systems and technical solutions have been tested at the different trial sites. In Umeå a warning system was tested where the driver received a warning signal (audio and visual) when the legal speed limit was exceeded. The system in Umeå from hereon in will be designated warning ISA.
In Borlänge a system was tested that used audio and visual warnings for breaches of the speed limit and in addition a display informed the driver about the existing speed limit on the road in question. This system from hereon in will be called informative ISA.
In Lund a system was tested that supported the driver's speed adaptation through an "active accelerator", which means when the driver has reached the legal speed limit a counter pressure is applied to the accelerator. A display was also used in Lund to show the legal speed limit. This system hereon in will be called active accelerator or abbreviated as active gas. In Lidköping both informative and active accelerator systems were tested.
In total approximately 5000 trial vehicles were included in the ISA trial. The majority, some 4000, have been based in Umeå. The remainder were distributed between Borlänge, Lund and Lidköping.
Different functions have been tested in different towns:
- Borlänge: 400 vehicles with the informative system.
- Lund: 290 vehicles with active accelerator.
- Lidköping: 150 vehicles with the informative system and 130 with active accelerator.
- Umeå: 4000 vehicles with the warning system.
It should be added that in Borlänge (and Lund) each vehicle that participated in the trial has been logged during the entire trial period.
Different groups of road users are included in the trials. In overall terms, private individuals account for the largest group, but professional road users, working for both private businesses and public authorities, including public transport vehicles, also account for a significant percentage.
Equipment carried by test users
In Lund, Lidköping and Borlänge, the vehicles are aware of their position thanks to GPS technology combined with a digital map. This map is downloaded into the car using a CD-ROM, for example.
In Umeå, the speed limits will be communicated by roadside transmitters to a receiver in the vehicle.
Pre-simulation / Piloting of the FOT
Method for the baseline
Techniques for measurement and data collection
In Borlänge (and Lund) each vehicle that participated in the trial has been logged during the entire trial period.
Recruitment goals and methods
~10000 voluntary test drivers.
The test drivers were both private car and commercial drivers.