The l number of vehicles waiting in the queue for

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Unformatted text preview: changing when there are more than 10 vehicles waiting in the queue is given. Table 20: Required Space for Lane Changing when there are Less than 3 Vehicles waiting in the Queue at the Lane Closure Taper Required Gaps for Lane Changing (ft) Speed Passenger Car Truck Lead Gap Vehicle Length Lag Gap Total Vehicle Length Total Speed <= 10 ft/s 5 ft 20 ft 30 ft 55 ft 65 ft 95 ft 10 ft/s <Speed <= 35 ft/s 10 ft 20 ft 45 ft 75 ft 65 ft 120 ft 35 ft/s <Speed <= 55 ft/s 20 ft 20 ft 55 ft 95 ft 65 ft 140 ft 55 ft/s <Speed <= 75 ft/s 20 ft 20 ft 65 ft 105 ft 65 ft 150 ft 75 ft/s < Speed 30 ft 20 ft 90 ft 140 ft 65 ft 185 ft 74 Table 21: Required Space for Lane Changing when there are Less than 5 Vehicles waiting in the Queue at the Lane Closure Taper Required Gaps for Lane Changing (ft) Speed Passenger Car Truck Vehicle Length 20 ft Lag Gap Total Speed <= 10 ft/s Lead Gap 5 ft Total 45 ft Vehicle Length 65 ft 20 ft 10 ft/s <Speed <= 35 ft/s 10 ft 20 ft 35 ft 65 ft 65 ft 110 ft 35 ft/s <Speed <= 55 ft/s 20 ft 20 ft 45 ft 85 ft 65 ft 130 ft 55 ft/s <Speed <= 75 ft/s 20 ft 20 ft 55 ft 95 ft 65 ft 140 ft 75 ft/s < Speed 30 ft 20 ft 80 ft 130 ft 65 ft 175 ft 90 ft Table 22: Required Space for Lane Changing when there are Less than 10 Vehicles waiting in the Queue at the Lane Closure Taper Required Gaps for Lane Changing (ft) Speed Passenger Car Truck Vehicle Length 20 ft Lag Gap Total Speed <= 10 ft/s Lead Gap 5 ft Total 35 ft Vehicle Length 65 ft 10 ft 10 ft/s <Speed <= 35 ft/s 10 ft 20 ft 25 ft 55 ft 65 ft 100 ft 35 ft/s <Speed <= 55 ft/s 20 ft 20 ft 35 ft 75 ft 65 ft 120 ft 55 ft/s <Speed <= 75 ft/s 20 ft 20 ft 45 ft 85 ft 65 ft 130 ft 75 ft/s < Speed 30 ft 20 ft 70 ft 120 ft 65 ft 165 ft 80 ft 75 Table 23: Required Space for Lane Changing when there are More than 10 Vehicles waiting in the Queue at the Lane Closure Taper Required Gaps for Lane Changing (ft) Speed Passenger Car Truck Vehicle Length 20 ft Lag Gap Total Speed <= 10 ft/s Lead Gap 5 ft Total 30 ft Vehicle Length 65 ft 5 ft 10 ft/s <Speed <= 35 ft/s 10 ft 20 ft 15 ft 45 ft 65 ft 90 ft 35 ft/s <Speed <= 55 ft/s 20 ft 20 ft 25 ft 65 ft 65 ft 110 ft 55 ft/s <Speed <= 75 ft/s 20 ft 20 ft 35 ft 75 ft 65 ft 120 ft 75 ft/s < Speed 30 ft 20 ft 60 ft 110 ft 65 ft 155 ft 75 ft 3.2.2.2 Flowchart of the ARENA Simulation Model Traffic in the simulation model was simulated for two- lane road reduced to one lane at I-76 Westbound construction work zone near Rootstown, Ohio. The flowchart of the ARENA simulation model is given in Figure 23. The SIMAN model and experimental codes of the model are given in Appendix D. The model starts with the creation of entities. The arrival of the entities (vehicles) are simulated by the create modules in ARENA as described in section 3.2.2.1.2 (page 54). The arrival rate is a discrete distribution dependent on the number of vehicles per hour per lane. Separate ARENA create modules are used for driving lane and passing lane for each 15 minute time interval. 76 After the arrival of the entities into the system according to the lanes, vehicle types are assigned according to the percentages given in Table 14. According to the vehicle type, the entities request transporters as cars or trucks. Four different transporter sets are defined in the model; car for driving lane, truck for driving lane, car for passing lane, and truck for passing lane. Initial speeds of the transporters are assigned as 95 feet per second. And the lengths of the transporters are assigned as described in vehicle types section. After entities are assigned to different types of transporters, they request the corresponding transporters to the first station defined. Entities are paired with the transporters and then the speeds of the transporters are assigned according to a normal distribution. Two different speed distributions are assigned in the model, one for passing lane and one for driving lane. Assigning different speeds, which were determined according to the field data, incorporated the driver types in the model. Some of the transporters have higher speeds and some has lower speeds. The transporters then transferred to the next station, which is the first left lane closure warning sign. Until the first sign transporters do not change lanes. Transporters with entities move through the system using the links determined with the SIMAN elements modules. For each location of interest, a station is assigned and these stations are assigned with the intersections, and then the intersections are connected with the links. Transporters move on these links, which represents the roadway. 77 After arriving to the station at the first lane closure sign, the speeds of the transporters are reduced because of the construction zone speed limits. The new speeds are assigned with a normal distribution function using the values given in Table 15. Then the transporters on the passing lane start looking for the available conditions for lane changing before they reach to the end of the...
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This document was uploaded on 02/26/2014 for the course E 515 at University of Louisiana at Lafayette.

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