Enhancing Motorway Exit Efficiency: Determining the Ideal Number of Toll Booths

This study presents a model for determining the optimal number of toll booths at barrier-operated freeway exit toll booths in Istanbul, considering mixed traffic conditions and payment methods. In the past decade, Istanbul has experienced rapid growth in its road network due to public-private partnership (PPP) projects. However, despite relatively modest demand, long queues are frequently observed at the exit toll booths of newly constructed PPP freeways, which utilize barrier-controlled toll collection systems. These toll booths offer both electronic toll collection (ETC) and manual toll collection (MTC) options, with MTC users required to come to a complete stop for transactions, while ETC users experience reduced speeds. The presence of mixed payment methods leads to significant interactions between vehicles, resulting in longer service times and limited toll booth capacity. To evaluate the system, service times were measured considering four vehicle classes, payment methods of both the leading and serving vehicles, and whether the serving vehicle needed to wait for money exchange. The findings reveal a wide range of service times, varying from 2.21 seconds to 36.04 seconds, and toll booth capacities ranging from 168 to 1017 vehicles per hour per lane for different vehicle classes, with an increase in MTC utilization.

Keywords:

Toll booth, Barrier control, Electronic toll collection, Manual toll collection Service time,

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