Abstract
Abu Dhabi’s government has taken several initiatives to improve the safety of the city’s highways, such as reducing traffic accident occurrence, red light violations, and property damage associated with traffic accidents. However, the intersections are still associated with many severe accidents, property damage associated with accidents, and red light violations. To help authorities pinpoint the major contributors to the deterioration of the safety performance of the signalized junctions, this study employed a negative binomial regression model to investigate the effect of geometric road conditions (in terms of the number of lanes of streets found in four-leg, three-leg, and different types of intersection) on property damage, red light violations, and severe accidents as safety performance indicators. The research found that, in both three-leg and four-leg intersections, most accidents and traffic light violations occur when minor streets pass through the intersection. This can be solved by converting these minor streets into major streets by increasing the number of lanes. This way, the capability of the minor street’s handling of increased traffic from the major streets significantly increases. The results also show that traffic speed is a major contributor to safety performance deterioration in these intersections. This can be solved by posting speed limits at these intersections. Results have also shown that, in Direction 1, when the main street passes through the intersection, the property damage type of accident is significantly high. This may be due to the presence of a potentially hazardous property or road design flaws on that side of the road. This effect needs further investigation to determine the hazardous property or the road design flaws causing these accidents.
Highlights
Despite the efforts taken by the Abu Dhabi Government to minimize accidents on the city’s roads, road intersections in this city are still associated with a high number of severe accidents, property damage associated with accidents, and red light violations
The results show that at four-leg intersections, when a minor road passes through the intersection, the number of lanes in that street has a significant impact on the red light violations compared to severe accidents and property damage
The Abu Dhabi Government has taken several initiatives to improve the safety of the city’s roads, such as reducing traffic accident occurrence, reducing red light violations, and reducing property damage associated with traffic accidents
Summary
This, in turn, safeguards the nation, its people, and its economic components against traffic-related accidents and incidents [1] For these efforts to work effectively, the major contributors towards the deterioration of the safety performance of the roads need to be identified and eliminated or minimized [2,3,4,5,6,7]. Examples of theoretical models are: Poisson’s regression, negative binomial regression, Nested Logit regression, and multiple linear regression [8,9,10,11,12,13]. These models are collectively known as crash-based models, and they can predict crashes on highways and intersections [14,15,16,17,18]
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