Vehicular traffic flow at a non-signalized intersection

Abstract

We have developed a modified Nagel–Schreckenberg cellular automata model for describing a conflicting vehicular traffic flow at the intersection of two streets. No traffic lights control the traffic flow. The approaching cars to the intersection yield to each other to avoid collision. Closed boundary condition is applied to the streets. Extensive Monte Carlo simulation is taken into account to find the model characteristics. In particular, we obtain the fundamental diagrams and show that the effect of the interaction of two streets can be regarded as a dynamic impurity located at the intersection point. Our results suggest that yielding mechanism gives rise to a high total flow throughout the intersection especially in the low density regime.

Emergence of bistable states and phase diagrams of traffic flow at an unsignalized intersection

“…Traffic flow at a single unsignalized intersection has been studied by using FI and NS cellular automata traffic flow model [31,36]. In Ref.…”

“…In Ref. [36] only the fundamental diagrams have been obtained. In this work, we have explored the phase diagrams driven by the bottleneck of one unsignalized intersection based on the NS model and parallel updated rules.…”

“…Isolated intersections are fundamental operating units of complex city road networks, and their thorough analysis would be inevitably advantageous not only for optimization of city road networks but also for local optimization purposes [36]. In some sense, the problems of two crossing roads can be regarded as the bottleneck, because vehicles on one road disturb passing the crossing point of the vehicles on the other road, playing the role of a bottleneck.…”

“…Nowadays, phase diagrams of traffic states induced by intersection bottlenecks have been frequently presented [29][30][31][32][33][34][35]. Some physicists have notably attempted to model and simulate the traffic flow at intersections including unsignalized and signalized intersections, roundabouts [29][30][31][32][33][34][35][36][37][38][39]. In the studies of unsignalized intersections [29][30][31][32][33][34], some scholars usually focus on a simple intersection which consists of two perpendicular one-lane roads: a northbound road and an eastbound one, which cross at the intersection point (i = 0) as shown in Fig.…”

Modeling gridlock at roundabout

“…Vehicles take turn to access the intersection. Typical examples are stop sign and traffic signal [4][5][6]. Schemes in the second category aim to avoid the full stop of any vehicle.…”