Application of Dynamic Lane-Use Control: Proposed Practices (2022) / Chapter Skim
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C-1 A P P E N D I X C Implementing Dynamic Lane-Use Control in a Connected Vehicle Environment OBJECTIVE The objective of Task 4 was to identify alternative methods of presenting information about laneuse and control to drivers beyond roadside signs and signals. Drivers are increasingly using invehicle navigation devices that provide them with turn-by-turn directions and real-time traffic information, and there is a possibility that lane-use and control information could be integrated into these navigation devices in the future.
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C-2 Application of Dynamic Lane-Use Control: Proposed Practices • A time stamp indicating when the message was generated. • A code indicating the type of event (hazard, alert, danger)
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Implementing Dynamic Lane-Use Control in a Connected Vehicle Environment C-3 Table C-1. General formatting for using ITIS codes to formulate RSA messages.
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C-4 Application of Dynamic Lane-Use Control: Proposed Practices Right shoulder. Closed to traffic.
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Implementing Dynamic Lane-Use Control in a Connected Vehicle Environment C-5 Value to be Expressed Regular Lanes open for travel Right Shoulder is Closed Speed Limit 65 mph Preferred Encoding Right shoulder, closed to traffic Shoulder-travel-no-longerallowed, Through lanes, open-totravel, Speed limit, n65,mph ITIS Byte Code Sequence 8208, 769, 7547, 8194, 891, 268, 12610, 8720 Figure C-2. RSA Message for returning to normal conditions after ATM event Lane Closures Figure C-3 shows the gantry configuration for a typical lane closure.
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C-6 Application of Dynamic Lane-Use Control: Proposed Practices Value to be Expressed Left Lane closed to traffic Use right shoulder as travel lane Speed Limit 65 mph Preferred Encoding Left lane, closed to traffic Right Shoulder, use shoulder as lane Speed limit n65, mph ITIS Byte Code Sequence 8195, 769, 8208, 7436, 268, 12610, 8720 Figure C-3. RSA Message for ATM gantry configuration for a left-lane closure condition.
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Implementing Dynamic Lane-Use Control in a Connected Vehicle Environment C-7 Value to be Expressed Incident(Accident) Ahead Left Lane closed to traffic, merge right Use right shoulder as travel lane Preferred Encoding Incident(accident)
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C-8 Application of Dynamic Lane-Use Control: Proposed Practices Value to be Expressed Stopped Traffic 2 miles Left Lane HOV traffic Only Speed Limit 45 mph Preferred Encoding Stopped traffic,n2, miles, Left lane, HOV 2 no single occupant vehicles, only, speed limit, n45 ITIS Byte Code Sequence 257, 12546, 8712, 8195, 2581, 7747, 268, 12589 Figure C-5. RSA message for ATM gantry configuration displaying variable speed limit information.
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Implementing Dynamic Lane-Use Control in a Connected Vehicle Environment C-9 Figure C-6. Sequencing of RSA message for conveying a right shoulder, hard-shoulder running ATM application.
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C-10 Application of Dynamic Lane-Use Control: Proposed Practices Figure C-7 shows the messages associated with a closure of the left lane without hard-shoulder running. The first sign, (located at the bottom of the diagram)
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Implementing Dynamic Lane-Use Control in a Connected Vehicle Environment C-11 Figure C-7. Sequencing of RSA messages for conveying a left-lane closure without hardshoulder running.
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C-12 Application of Dynamic Lane-Use Control: Proposed Practices Figure C-8. Sequencing of RSA messages for conveying a left-lane closure with simultaneous hard-shoulder running.
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Implementing Dynamic Lane-Use Control in a Connected Vehicle Environment C-13 Figure C-9. Sequencing of RSA messages for conveying a closure of a center lane.
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C-14 Application of Dynamic Lane-Use Control: Proposed Practices Figure C-10. Sequencing of RSA messages for conveying a dual right lane closure with no right shoulder running.
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