Title: Statistical Characterization of Vehicles in 2-lane Roads in Spain
Abstract: Two-lane roads are not easy to model. Macroscopic models omit the queue structure, essential for characterizing the level of service. Microscopic models are more adequate, but in practical terms they can be considered inadequate, since they require the introduction of data unavailable for most areas. This paper seeks to provide information to improve the use of microscopic models, in particular for the Madrid Region. Traditional vehicle types are passenger cars, trucks, buses and motorcycles. However, it is clear that congestion is caused by heavy vehicles, but also by slower cars, both having lower desired speeds. These slower vehicles can travel isolated or as platoon leaders. This paper focuses on the speed distributions of different vehicle types and queue structure, to establish measurement procedures and what errors arise from considering isolated vehicles or queue leaders. It also provides statistical information on desired speed distributions and day and nighttime driving in two-lane roads in the Madrid region. A new isolated vehicle criterion is proposed, allowing less restrictive conditions and larger sample sizes. Other conclusions are established regarding the inclusion of all platoon leaders in design speed considerations, and whether different populations can be established regarding queue length behind a vehicle.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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