driving behaviour determination for Dutch national emission factors

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Presentation transcript:

vapos determination in Dutch traffic driving behaviour boundary | Norbert Ligterink

driving behaviour determination for Dutch national emission factors professional driver: following cars and vans with constant headway random selection of vehicles to follow based on licence plate numbers 50 km distance per trip: 30 min - 1 hour of driving per trip equal distance split urban/rural/motorway vehicle velocity based on wheel speed (GPS also available) So far: 68 hours of data at 1 Hz 120 trips collected (ongoing) full coverage of Dutch roads 2 | vapos determination in Dutch traffic 17 September 2015

the routes till 14/9 3 | vapos determination in Dutch traffic 17 September 2015

Velocity signals required quality for determining acceleration wheel speed gives accurate and robust signal (e.g. ABS) GPS signal is poor, deviating, and absent 5%-15% of the time OBD signal often “stylized” optical signal can be improved 4 | velocity signal 14 September 2015

Independent determination of velocity based on wheel speed calibrated with GPS alternative setups possible with appropriate accuracy requirements typical tachometer 5 | velocity signal 14 September 2015

GPS deviation 6 | vapos determination in Dutch traffic 17 September 2015

V*apos determination 7 | vapos determination in Dutch traffic 17 September 2015

V*apos determination current proposal of the boundary in v*apos seems low, based on this data 8 | vapos determination in Dutch traffic 17 September 2015

Thank you for your attention