TY  - JOUR
PY  - 2005//
TI  - Understanding spatial concentrations of road accidents using frequent item sets
JO  - Accident analysis and prevention
A1  - Wets, Geert
A1  - Thomas, Isabelle
A1  - Geurts, Karolien
SP  - 787
EP  - 799
VL  - 37
IS  - 4
N2  - This paper aims at understanding why road accidents tend to cluster in specific road segments. More particularly, it aims at analyzing which are the characteristics of the accidents occurring in "black" zones compared to those scattered all over the road. A technique of frequent item sets (data mining) is applied for automatically identifying accident circumstances that frequently occur together, for accidents located in and outside "black" zones. A Belgian periurban region is used as case study. Results show that accidents occurring in "black" zones are characterized by left-turns at signalized intersections, collisions with pedestrians, loss control of the vehicle (run-off-roadway) and rainy weather conditions. Accidents occurring outside "black" zones (scattered in space) are characterized by left turns on intersections with traffic signs, head-on collisions and drunken road user(s). Furthermore, parallel collisions and accidents on highways or roads with separated lanes, occurring at night or during the weekend are frequently occurring accident patterns for all accident locations. These exploratory results show the potentiality of the frequent item set method in addition to more classical statistical techniques, but also suggest that there is no unique countermeasure for reducing the number of accidents.
LA  - en
SN  - 0001-4575
UR  - http://dx.doi.org/10.1016/j.aap.2005.03.023
ID  - ref1
ER  -