Probable Intersection Layouts and Effects on Traffic Flow at Ring Road upon the Operation of Multi Level Car Park at Tribhuvan International Airport

Trbhuvan international Airport (TIA) is only one International Airport in Kathamandu. It has one domestic and one international terminal. The road intersection at the access road of the TIA and the Ring Road is one of the important intersections of traffic network of Kathmandu city. The probable impact on the Ring Road and road to multi level car park was investigated. SIDRA INTERSECTION 5.1 was used to analyze the delay and queue lengths at the intersection. The traffic count, vehicle dimensions, movement data and geometric data of the site were used as input for analysis. Four parameters consisting of average delay, level of service degree of saturation and queue length were considered for the analysis of the probable intersection layouts. The intersection was analyzed as of existing intersection layout and other six alternative options. The operational performance of intersection at ring road due to multi level car park without any improvement was found to cause more average delay and queue lengths under the existing layout. The analysis of probable intersection layouts show that right turn movements were main cause of traffic disturbance resulting into increased delay and queue length.