Estimating the Driver’s Workload: Using Smartphone Data to Adapt In-vehicle Information Systems

Research Question: How can the driver’s workload be estimated in order toadapt information and entertainment systems?Approach: Smartphone sensor data, situational factors and basic user characteristicsare collected. This data is tested whether it significantly influencesworkload and can be used to estimate it.Method: Workload is measured with a smartphone-based representation ofthe NASA-TLX and the RSME during a user study with 20 participants ondifferent road types.Results: Driving situation, gender and driving frequency significantly influenceworkload. Using only this information and smartphone sensor datathe driver’s current workload can be estimated with 86% accuracy using adecision tree