Displaced left-turn (DLT) intersections have gained their popularity because their implementation reduces control delay and improves the level of traffic safety. Their alternative configuration of traffic lanes enables the execution of left turns within the central part of the intersection without conflict with vehicles from the opposite direction. On the other hand, in Serbia, a large number of roundabouts have been constructed in recent decades for which no prior analyses of capacity and level of service were carried out, nor forecasts of traffic demand for the planned operational period. For that reason, some roundabouts exhibit very unfavorable traffic flow conditions with high vehicle delays, especially in situations when the circulating zone is blocked. Within this research, the possibility of applying a DLT intersection is considered by reconstructing a roundabout in the city of Novi Sad where unfavorable traffic flow conditions occur during peak hours. The analysis was conducted through a comparison of delays, queue lengths, and level of service in relation to a conventional (four-leg) signalized intersection as another proposed solution. The evaluation of traffic flow conditions was carried out through simulation in the Vissim software (Student version). By applying both proposed solutions, efficient traffic flow would be ensured, where the obtained parameters indicate the advantage of the DLT intersection.
Displaced left-turn (DLT) intersections have gained their popularity because their implementation reduces control delay and improves the level of traffic safety. Their alternative configuration of traffic lanes enables the execution of left turns within the central part of the intersection without conflict with vehicles from the opposite direction. On the other hand, in Serbia, a large number of roundabouts have been constructed in recent decades for which no prior analyses of capacity and level of service were carried out, nor forecasts of traffic demand for the planned operational period. For that reason, some roundabouts exhibit very unfavorable traffic flow conditions with high vehicle delays, especially in situations when the circulating zone is blocked. Within this research, the possibility of applying a DLT intersection is considered by reconstructing a roundabout in the city of Novi Sad where unfavorable traffic flow conditions occur during peak hours. The analysis was conducted through a comparison of delays, queue lengths, and level of service in relation to a conventional (four-leg) signalized intersection as another proposed solution. The evaluation of traffic flow conditions was carried out through simulation in the Vissim software (Student version). By applying both proposed solutions, efficient traffic flow would be ensured, where the obtained parameters indicate the advantage of the DLT intersection.
Displaced left-turn (DLT) intersections have gained their popularity because their implementation reduces control delay and improves the level of traffic safety. Their alternative configuration of traffic lanes enables the execution of left turns within the central part of the intersection without conflict with vehicles from the opposite direction. On the other hand, in Serbia, a large number of roundabouts have been constructed in recent decades for which no prior analyses of capacity and level of service were carried out, nor forecasts of traffic demand for the planned operational period. For that reason, some roundabouts exhibit very unfavorable traffic flow conditions with high vehicle delays, especially in situations when the circulating zone is blocked. Within this research, the possibility of applying a DLT intersection is considered by reconstructing a roundabout in the city of Novi Sad where unfavorable traffic flow conditions occur during peak hours. The analysis was conducted through a comparison of delays, queue lengths, and level of service in relation to a conventional (four-leg) signalized intersection as another proposed solution. The evaluation of traffic flow conditions was carried out through simulation in the Vissim software (Student version). By applying both proposed solutions, efficient traffic flow would be ensured, where the obtained parameters indicate the advantage of the DLT intersection.
