TY  - JOUR
A1  - Meel, Inder P.
A1  - Brannolte, Ulrich
A1  - Satirasetthavee, Dussadee
A1  - Kanitpong, Kunnawee
T1  - Safety impact of application of auxiliary lanes at downstream locations of Thai U-turns
JF  - IATSS Research
N2  - To assess the safety impact of auxiliary lanes at downstream locations of U-turns, the Traffic Conflict Technique was used. On the basis of the installed components at those locations, four types of U-turns were identified: those without any auxiliary lane, those with an acceleration lane, those with outer widening, and those with both an acceleration lane and outer widening. The available crash data is unreliable, therefore to assess the level of road safety, Conflict Indexes were formulated to put more emphasis on severe crashes than on slight ones by using two types of weighting coefficients. The first coefficient was based on the subjective assessment of the seriousness of the conflict situation and the second was based on the relative speed and angle between conflicting streams. A comparatively higher Conflict Index value represents a lower level of road safety. According to the results, a lower level of road safety occurs if two components apply or if a location is without any auxiliary lane. The highest level of road safety occurs if the layout includes only a single component, either an acceleration lane or outer widening.
KW  - Verkehrssicherheit
KW  - Beschleunigungsstreifen
KW  - Auxiliary lane; Conflict Indexes; Road safety; Traffic Conflict Technique; U-turn
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170401-31016
UR  - http://www.sciencedirect.com/science/article/pii/S0386111216300140
ER  -