A real-time traffic control method for the intersection with pre-signals under the phase swap sorting strategy

<div><p>To deal with the conflicts between left-turn and through traffic streams and increase the discharge capacity, this paper addresses the pre-signal which is implemented at a signalized intersection. Such an intersection with pre-signal is termed as a tandem intersection. For the tandem intersection, phase swap sorting strategy is deemed as the most effective phasing scheme in view of some exclusive merits, such as easier compliance of drivers, and shorter sorting area. However, a major limitation of the phase swap sorting strategy is not considered in previous studies: if one or more vehicle is left at the sorting area after the signal light turns to red, the capacity of the approach would be dramatically dropped. Besides, previous signal control studies deal with a fixed timing plan that is not adaptive with the fluctuation of traffic flows. Therefore, to cope with these two gaps, this paper firstly takes an in-depth analysis of the traffic flow operations at the tandem intersection. Secondly, three groups of loop detectors are placed to obtain the real-time vehicle information for adaptive signalization. The lane selection behavior in the sorting area is considered to set the green time for intersection signals. With the objective of minimizing the vehicle delay, the signal control parameters are then optimized based on a dynamic programming method. Finally, numerical experiments show that average vehicle delay and maximum queue length can be reduced under all scenarios.</p></div

The intersection with pre-signals on all approaches.

<p>The intersection with pre-signals on all approaches.</p

Average Relatedness of Different Methods.

<p>Average Relatedness of Different Methods.</p

Signal timing plans for Plan II under different scenarios (Unit: s).

<p>Signal timing plans for Plan II under different scenarios (Unit: s).</p

CBOW model.

<p>CBOW model.</p

Preference Classification Precision of Different Methods.

<p>Preference Classification Precision of Different Methods.</p

Link-based knowledge is constructed according to the topology as shown in Fig. 2.

<p>Link-based knowledge is constructed according to the topology as shown in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0118437#pone.0118437.g002" target="_blank">Fig. 2</a>.</p

Decrease percentages in AVD and MQL of Plan I.

<p>Decrease percentages in AVD and MQL of Plan I.</p

Average relatedness.

<p>Average relatedness.</p

The intersection phasing scheme without intergreen time.

<p>The intersection phasing scheme without intergreen time.</p