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Road Accidents and Traffic Flows: An Econometric Investigation
Author(s) -
Dickerson Andrew,
Peirson John,
Vickerman Roger
Publication year - 2000
Publication title -
economica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.532
H-Index - 65
eISSN - 1468-0335
pISSN - 0013-0427
DOI - 10.1111/1468-0335.00198
Subject(s) - externality , accident (philosophy) , traffic flow (computer networking) , transport engineering , traffic accident , road traffic , econometric model , econometrics , computer science , economics , engineering , computer security , microeconomics , philosophy , epistemology
This paper develops an empirical model of the relationship between road traffic accidents and traffic flows. The analysis focuses on the accident externality, which is determined mainly by the difference between the marginal and average risks. The model is estimated using a new data‐set which combines hourly London traffic count data from automated vehicle recorders together with police records of road accidents. The accident‐flow relationship is seen to vary considerably between different road classes and geographical areas. More importantly, even having controlled for these and other differences, the accident externality is shown to vary significantly with traffic flows. In particular, while the accident externality is typically close to zero for low to moderate traffic flows, it increases substantially at high traffic flows.