Home Menu Search

Volvo 'IDIS' Helps the Driver Avoid Distractions in Busy Situations

1 November 2006

  • IDIS: Intelligent Driver Information System
  • An electronic 'personal assistant' to prevent the driver from interruptions
  • Delays incoming calls or non-essential messages in busy driving situations
  • Prepared for a future with more on-board information and safety systems

'IDIS' (Intelligent Driver Information System) is an innovative feature that Volvo introduced in the all-new Volvo S40 saloon, V50 Sportswagon and the S80 executive saloon.
IDIS helps the driver prioritise the information in the car depending on the current driving situation. For example, IDIS delays incoming phone calls or other non-essential information if the driving situation is busy, e.g. during acceleration or a manoeuvre. As such, it functions pretty much like an electronic personal assistant.

IDIS consists of two parts: a workload estimator and an information manager. The workload estimator continuously monitors the driver’s activity by checking on such parameters as steering wheel movement, speed variations and the turn signal indicators. This information is processed and at a certain workload level, the information manager delays the incoming information.

The driver’s calculated workload level is the basis from which IDIS prioritises the flow of information in the car. Other parameters are time and the ranking of the various categories. Information vital to safety is never delayed. Nor does the driver ever lose any information – it is only presented a few seconds later, when the workload is somewhat lower.

Measuring driver activity
In a Volvo, the Multiplex computerised electrical system contains most of the information that is supplied by various sensors and controls in the car. Examples of the type of information used to continuously calculate the driver’s workload are:

  • Acceleration
  • Speed reduction
  • Turn signal indicators
  • Steering wheel angle
  • Reverse gear engagement
  • Infotainment controls

When a signal exceeds its threshold value, this is known as an “event”. However, it is more common for several different events to occur consecutively, with a small interval between each. In order to overcome this, IDIS has a built-in delay function that holds up the information for a short while even after a completed event. In this way, the system can detect situations where the workload drops only temporarily. The system will interpret the workload as high throughout this situation, so information that is not safety-related will still be delayed.

How it works
When coming to a T-junction, the driver is stressed by the fact that the phone rings just as he is about to enter the junction. Although the traffic situation requires all his concentration, he still answers the phone. If only just to silence it.

In this example, the driver is not focusing fully on safety and probably does not feel very comfortable with the situation. With IDIS in the car, the driver simply does not receive the incoming call while he is negotiating the junction. IDIS accepts the call but silences it and delays alerting the driver until the turn or workload is lower.

Calls delayed for up to five seconds
With IDIS activated, phone calls can be delayed for up to five seconds. After that, calls are handled in the same way as if the driver were already speaking on the phone, that is to say by either issuing a “busy” signal or by transferring the call to a voice-mail function, depending on the settings registered with the operator. In the event of call transfer, the driver always receives a message that he has missed a call. That message will be displayed once his workload has lessened.

Helps the driver prioritise
The only information that comes through the information manager in high workload situations is time-critical safety-related messages. Information such as car messages, incoming phone calls is delayed accordingly.

The system is designed to help the driver concentrate on the road in tricky situations. IDIS is fitted in all new Volvo C30, S40, V50, C70 and S80 models and it is always active unless manually disengaged. The driver can also choose to disengage only the phone’s IDIS function. With the IDIS method of handling phone calls, Volvo takes a further step towards safer use of in-car phones.

Increasingly useful in the future
The input used today is sufficient to manage the information being handled in the new S40. As more information is channelled into the system, there will be heightened demands concerning calculation of the driver’s workload. Volvo will continue to focus sharply on the development of these forthcoming generations of IDIS.

Related news, events and information

Volvo Cars and Volvo Trucks share live vehicle data to improve traffic safety

9 May 2018 – Story from News Press. This is the first instance of Volvo Cars sharing safety-related data with another...

Make safety a deal breaker

24 January 2018 – In announcing The Volvo XC60 as the winners of the UK What Car? Safety Award Thatcham Research points out that...

Car safety technology - how it could save your life

28 February 2018 – In a really good article, What Car highlights that active safety systems are now commonplace on new cars,...

New mobile phone detection signs trialled in Norfolk

24 July 2018 – Story from Fleet News Norfolk County Council is trialling road signs that detect when drivers are using a...

Volvo and Ford keep pace with Euro NCAP’s safety challenge

18 July 2018 – Euro NCAP has released the safety ratings of two new cars. Both Volvo's new small off-roader, the XC40, and...

Study reveals automated driving hype is dangerously confusing drivers

26 October 2018 – Story from Thatcham Research. 71% of drivers around the world believe they can purchase a self-driving car...

Phone-disabling software should be used in government cars

16 March 2017 – Story from ABC news. The Australian federal government is being urged to lead by example when it comes to...

Carmaker warns use of the word ‘Autonomous’ is a danger to UK roads

18 June 2018 – Story from NewsPress The driver must always be in control. Use of the word Autonomous in carmaker marketing...

MEPs call for new car safety tech to be fitted as standard

17 October 2017 – The European Parliament's Transport Committee has called for new cars to be fitted as standard with a range of...