Nielsen, Bo Friis1; Frølich, Laura6; Nielsen, Otto Anker7; Filges, Dorte8
1 Department of Applied Mathematics and Computer Science, Technical University of Denmark2 Statistics and Data Analysis, Department of Applied Mathematics and Computer Science, Technical University of Denmark3 Cognitive Systems, Department of Applied Mathematics and Computer Science, Technical University of Denmark4 Department of Transport, Technical University of Denmark5 Traffic modelling and planning, Department of Transport, Technical University of Denmark6 Department of Informatics and Mathematical Modeling, Technical University of Denmark7 Department of Management Engineering, Technical University of Denmark8 Danish Road Directorate
Knowing passenger numbers is important for the planning and operation of the urban rail systems. Manual and electronic counting systems (typically infrared or video) are expensive and therefore entail small sample sizes. They usually count boarding and alighting passengers, which means that errors in estimates of total numbers of passengers propagate along train runs. Counting errors in manual and electronic counting systems are typically flow-dependent, making uncertainty a function of volume. This paper presents a new counting technique that exploits the weighing systems installed in most modern trains to control braking. This technique makes passenger counting cheaper and ensures a complete sample. The paper compares numbers estimated by this technique with manual counts and counts from an infrared system in trains in urban Copenhagen. It shows that the weighing system provides more accurate passenger counts than the infrared equipment. The method has been validated on a large data set and is now in full operation in the urban Copenhagen rail system.
Transportmetrica A: Transport Science, 2013, Vol 10, Issue 6