Abstract
The International Roughness Index (IRI) is the standard scale for evaluating road roughness in many countries in the world. The Taipei City government actively promotes a Road Smoothing Project and plans to complete the rehabilitation of the main and minor roads within its jurisdiction. This study aims to detect the road surface roughness in Taipei City and recommend appropriate IRI thresholds for road rehabilitation. A total of 171 asphalt concrete pavement sections in Taipei City with a total length of 803.49 km were analyzed and compared by IRI. The longitudinal profile of the detected road sections was measured using an inertial profiler. The statistical analysis showed that the IRI value prior to road leveling was mainly distributed between 5 and 8 m/km, while the IRI value after road leveling was mainly distributed between 3 and 4.5 m/km. This confirms that the implementation of the Road Smoothing Project has a significant effect on improving road smoothness. Moreover, based on the analysis results, it is recommended that the IRI threshold value for road rehabilitation in Taipei City be set at 4.50 m/km.
Highlights
Cities are areas with a high density of living environments and active economic activities
Due to the low speed on urban roads, comfortable driving can still be achieved under high International Roughness Index (IRI) values
The speed of urban roads is low, so comfortable driving can still be achieved under high IRI values
Summary
Cities are areas with a high density of living environments and active economic activities. Due to human communication and economic activities, urban roads are usually planned as interconnected networks. Urban roads are composed of roadways, sidewalks, green belts, drainage systems, transportation facilities, intersections and auxiliary facilities. Urban road design needs to meet the traffic characteristics and traffic needs of its service objects (people, goods, cars, etc.). The pros and cons of road service performance are often reflected in the quantity, quality, and form. The scale of road construction should be sufficient, the road structure can ensure safe driving, the road network layout and road alignment should be reasonable, and the auxiliary facilities and management standards should be matched. Providing complete roads and good service performance is one of the important functions of modern cities, and the foundation of sustainable urban development
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
