80 driving lane assumptions assign different speeds

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Unformatted text preview: " Sign Station Arrive to the First "Left Lane Closed Ahead" Sign Station Assign New Speed at the "Left Lane Closed Ahead" Sign Assign New Speed at the "Left Lane Closed Ahead" Sign Truck Car Figure 23: Flowchart of the ARENA Traffic Simulation Model (continued) Assign different speed values for the entity-transporter pairs using a speed distribution derived from actual data collected Entities(vehicles) travel through the mainline with free flow speed Entities (vehicles) arrive to the first lane closure sign and new speeds assigned for the travel in the construction zone 81 DRIVING LANE Assumptions Truck PASSING LANE Car Car Truck At First "Left Lane Closed Ahead" Sign Station Passing Lane Speed >= Driving Lane Speed NO NO NO NO YES NO Lag Gap in Driving Lane >= 170 ft YES NO Lag Gap in Driving Lane >= 140 ft YES NO Lag Gap in Driving Lane >= 95 ft Lag Gap in Driving Lane >= 65 ft Go to Next Station on Passing Lane (250 ft after the first 'Left Lane Closed Ahead' Sign) YES YES NO Lead Gap in Driving Lane >= 170 ft YES YES Lead Gap in Driving Lane >= 140 ft 35 ft/s >= Driving Lane Speed > 10 ft/s NO YES YES 55 ft/s >= Driving Lane Speed > 35 ft/s NO YES Lead Gap in Driving Lane >= 215 ft 75 ft/s >= Driving Lane Speed > 55 ft/s NO YES YES Driving Lane Speed > 75 ft/s NO YES 35 ft/s >= Driving Lane Speed > 10 ft/s NO NO Lag Gap in Driving Lane >= 215 ft 55 ft/s >= Driving Lane Speed > 35 ft/s NO NO NO 75 ft/s >= Driving Lane Speed > 55 ft/s NO NO YES Driving Lane Speed > 75 ft/s YES YES YES Lead Gap in Driving Lane >= 95 ft Lead Gap in Driving Lane >= 65 ft YES Merge and Go to Next Station on Driving Lane (250 ft after the first 'Left Lane Closed Ahead' Sign) Figure 23: Flowchart of the ARENA Traffic Simulation Model (continued) YES Explanations: According to the difference in speed between the entitytransporter pair on passing lane and the entity-transporter pair on driving lane, the lag and the lead gaps are determined Entity cartransporter pairs on the passing lane at the first “Left Lane Closed Ahead” sign check for the availability of space on driving la ne. If the specified gaps are available on the driving lane, entity car-transporter pair merges to the driving lane; else it continues to travel on the passing lane. 82 DRIVING LANE Assumptions Truck PASSING LANE Car Explanations: Truck Car At First "Left Lane Closed Ahead" Sign Station Passing Lane Speed >= Driving Lane Speed NO NO NO NO Truck Car YES NO Lag Gap in Driving Lane >= 215 ft YES NO Lag Gap in Driving Lane >= 185 ft YES NO Lag Gap in Driving Lane >= 140 ft Lag Gap in Driving Lane >= 110 ft Go to Next Station on Passing Lane (250 ft after the first 'Left Lane Closed Ahead' Sign) YES YES NO Lead Gap in Driving YES Lane >= 215 ft YES Lead Gap in Driving Lane >= 185 ft 35 ft/s >= Driving Lane Speed > 10 ft/s NO YES YES 55 ft/s >= Driving Lane Speed > 35 ft/s NO YES Lead Gap in Driving Lane >= 260 ft 75 ft/s >= Driving Lane Speed > 55 ft/s NO YES YES Driving Lane Speed > 75 ft/s NO YES 35 ft/s >= Driving Lane Speed > 10 ft/s NO NO Lag Gap in Driving Lane >= 260 ft 55 ft/s >= Driving Lane Speed > 35 ft/s NO NO NO 75 ft/s >= Driving Lane Speed > 55 ft/s NO NO YES Driving Lane Speed > 75 ft/s YES YES YES Lead Gap in Driving YES Lane >= 140 ft Lead Gap in Driving Lane >= 110 ft YES Merge and Go to Next Station on Driving Lane (250 ft after the first 'Left Lane Closed Ahead' Sign) Figure 23: Flowchart of the ARENA Traffic Simulation Model (continued) Entity trucktransporter pairs on the passing lane at the first “Left Lane Closed Ahead” sign check for the availability of space on driving lane. If the specified gaps are available on the driving lane, entity truck-transporter pair merges to the driving lane; else it continues to travel on the passing lane. 83 DRIVING LANE Assumptions PASSING LANE Truck Arrive to the Station 250 feet after the first "Left Lane Closed Ahead Sign Car Car Arrive to the Station 250 feet after the first "Left Lane Closed Ahead Sign Same Speed and Gap Check Procedure for both entity types Explanations: Arrive to the Station 250 feet after the first "Left Lane Closed Ahead Sign Same Speed and Gap Check Procedure for both entity types The same gap acceptance and lane changing procedure continues until the beginning of the left lane closure taper. Arrive to the Station 250 feet after the first "Left Lane Closed Ahead Sign Truck Transport to the Second "Left Lane Closed Ahead" Sign Transport to the Second "Left Lane Closed Ahead" Sign Transport to the Second "Left Lane Closed Ahead" Sign Transport to the Second "Left Lane Closed Ahead" Sign Truck Car Truck Car Figure 23: Flowchart of the ARENA Traffic Simulation Model (continued) Entity-transporter pairs on the passing lane continue to check for the available gap for merging to the driving lane. They check for...
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