Unsignaled Interceptions Performance Evaluation at the Jetak Gondangrejo Interception of Karanganyar District

Unsignaled Interchange At Jetak Interchange, Gondangrejo, Karanganyar Regency is a commercial area so that it has complete traffic and fast traffic growth rates. From this, this study aims to determine the evaluation of intersection performance which includes intersection capacity, degree of saturation, intersection delay, queue opportunities, and service level. The study was conducted with field surveys for two days, namely : Saturday and Monday consisting of preliminary surveys, geometric surveys, and traffic flow surveys. This observation is based on primary data, namely data taken directly in the field and then processed with reference to MKJI 1997. For the calculation parameter of the intersection performance evaluation, peak hours per day are selected and then calculated according to MKJI 1997. From the calculation of the performance of the intersection in existing conditions, suboptimal results were obtained with a capacity of 2500.19smp/hour, DS 1.10, delay of intersection 26sec/smp, category C (medium), chance of queuing 49-98% during peak hours Saturday, during peak hours Monday capacity 3427.05smp/hour, DS 0.91, delay intersection 16sec/smp, category C (medium), chance of queuing 33-66%. The solution is to reduce side obstacles and widen major roads and minor roads. Interchange performance after repair obtained a capacity value of 2635.96smp/hour, DS 1.05, intersection delay 21sec/smp, category C (medium), queue chance 44-87% during peak hours Saturday, Monday peak hours capacity 3632.95smp/hour, DS 0.86, intersection delay 14sec/smp, category B (good), queue chance 30-59%.