TY - JOUR
T1 - Evaluation of a cellular phone-based system for measurements of traffic speeds and travel times
T2 - A case study from Israel
AU - Bar-Gera, Hillel
N1 - Funding Information:
Financial support from ITIS inc. and Estimotion Ltd. is greatly appreciated. The author wishes to thank Uri Lavee and Israel Feldman from Estimotion Ltd. for their collaboration and for the cellular phone system data. The author also wishes to thank Ayalon Highways Company and their Traffic Control Department team, Vedran Kulic and Lev Krasilashikov, for providing loop detectors data and for their collaboration. Valuable comments from four anonymous referees contributed to improve the paper. The opinions expressed in this paper reflect the views of the author only.
PY - 2007/1/1
Y1 - 2007/1/1
N2 - The purpose of this paper is to examine the performance of a new operational system for measuring traffic speeds and travel times which is based on information from a cellular phone service provider. Cellular measurements are compared with those obtained by dual magnetic loop detectors. The comparison uses data for a busy 14 km freeway with 10 interchanges, in both directions, during January-March of 2005. The dataset contains 1 284 587 valid loop detector speed measurements and 440 331 valid measurements from the cellular system, each measurement referring to a 5 min interval. During one week in this period, 25 floating car measurements were conducted as additional comparison observations. The analyses include visual, graphical, and statistical techniques; focusing in particular on comparisons of speed patterns in the time-space domain. The main finding is that there is a good match between the two measurement methods, indicating that the cellular phone-based system can be useful for various practical applications such as advanced traveler information systems and evaluating system performance for modeling and planning.
AB - The purpose of this paper is to examine the performance of a new operational system for measuring traffic speeds and travel times which is based on information from a cellular phone service provider. Cellular measurements are compared with those obtained by dual magnetic loop detectors. The comparison uses data for a busy 14 km freeway with 10 interchanges, in both directions, during January-March of 2005. The dataset contains 1 284 587 valid loop detector speed measurements and 440 331 valid measurements from the cellular system, each measurement referring to a 5 min interval. During one week in this period, 25 floating car measurements were conducted as additional comparison observations. The analyses include visual, graphical, and statistical techniques; focusing in particular on comparisons of speed patterns in the time-space domain. The main finding is that there is a good match between the two measurement methods, indicating that the cellular phone-based system can be useful for various practical applications such as advanced traveler information systems and evaluating system performance for modeling and planning.
KW - Cellular phones
KW - Probe vehicles
KW - Travel time measurement
UR - http://www.scopus.com/inward/record.url?scp=35148845736&partnerID=8YFLogxK
U2 - 10.1016/j.trc.2007.06.003
DO - 10.1016/j.trc.2007.06.003
M3 - Article
AN - SCOPUS:35148845736
SN - 0968-090X
VL - 15
SP - 380
EP - 391
JO - Transportation Research Part C: Emerging Technologies
JF - Transportation Research Part C: Emerging Technologies
IS - 6
ER -