Agent-based modeling of lane discipline in heterogeneous traffic

Abstract

Designating lanes for different vehicle types is ideal road safety-wise. Practical considerations, however, require road sharing. Using a modified Nagel-Schrekenberg cellular automata model for two vehicle types (cars and motorcycles), we analyzed the interplay of lane discipline, lane changing, and vehicle density. In the absence of lane changing, the transition between free flow and congested states occurs at a higher vehicle (road occupation) density when the ratio of cars to motorcycles is increased. When lane changing is allowed, the smaller motorcycles tend to fill in unused spaces, until the point when the wider cars effectively block their way at high vehicle densities. When the condition of lane discipline is not imposed, i.e. staying wholly within lane boundaries is not required, further improvement in throughput becomes possible at the cost of required driver attentiveness.

Vehicular traffic modeling with greedy lane-changing and inordinate waiting

“…In our previous model [21] wherein vehicles have a probability p λ to change lanes, it was observed that having low p λ impeded traffic flow, particularly for the case of cars wherein obstruction can occur. This effect is mitigated by ensuring that vehicles do not remain in between two lanes (p λ close to 1).…”

“…Previously, we investigated the scenario wherein all vehicles may change lanes, with a probability p λ at which they are able to successfully change lanes [21]. Here, we focus on permitting only a fraction f of vehicles to change lanes with probability p λ = 1, with the remaining vehicles having p λ = 0.…”

“…Changing lanes, particularly with larger vehicles, such as cars, introduce another problem. There is a possibility that in trying to optimize its speed, a car that is changing lanes may cause vehicles behind it to slow down to accommodate the lane changing car [21]. Such was shown to be most detrimental at low p λ values.…”

Design and development of anchoring positioning control system for riprap leveling ship

“…The flow of Hanjiang River can be obtained by model test or empirical formula. This paper belongs to the preliminary design stage, using empirical formula to calculate [8][9][10] .…”

From cellular automata to agent-based models : addressing urban issues

“…As with the OV model, the NaSch model is also able to capture a wide range of traffic phenomenon such as the existence of a free-flowing and a congested phase. The simplicity of the rule-based evolution results in the NaSch model being highly popular in the traffic modelling community, from theoretically motivated studies [23,24] to studies with high practical applicability [25][26][27][28][29][30][31]. Most notably, the simplicity of the NaSch model -or discrete models in general -facilitates analytical predictions [32,33] on various macroscopic variables, which can provide valuable insights in understanding a complex system.…”