10 - Chapter6-Introduction to HCM and LOS

10 - Chapter6-Introduction to HCM and LOS - Introduction to...

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Introduction to HCM and LOS TTE 4004 10/7/11
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Attendance Quiz On Monday
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Class Schedule Lab Schedule
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Extra Credit Project Group Presentation During lab time Attendance required Replaces one in-class design problem Optional group paper Same topic as presentation Replaces one homework assignment 5 points on test = 40% on homework = 30% on ICDP = +1% overall
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Introduction to HCM and LOS
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Highway Capacity Manual (HCM) The HCM is a synthesis of the state of art in methodologies for quantifying traffic operational performance and capacity utilization for a variety of transportation facilities
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Highway Capacity Manual (HCM) Tells us how to find: Capacity Maximum amount of traffic that can use the facility Level of service How well the facility is performing Is it overly congested or not Consensus of best practices Not a standard, but used as one
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HCM Evolution First published in 1950 Second edition in 1965 Third edition in 1985 Fourth edition in 2000 Fifth edition in 2010 160 pages 432 pages 512 pages 1,224 pages 1,650 pages (3 volumes) + 1 volume online only Scope has grown over time to cover more system elements and modes More detailed procedures
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HCM 2010 Volume 1 – Concepts Volume 2 – Uninterrupted Flow Freeways, multilane, two-lane Volume 3 – Interrupted Flow Urban streets, signals Volume 4 – Applications Guide Simulation
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Highway Capacity Software (HCS) Implements the procedures in HCM Developed and maintained by McTrans at UF
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Level of Service (LOS) Qualitative ranking of the traffic operational conditions experienced by the users of a facility under specified roadway, traffic, and traffic control (if present) conditions
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Level of Service (LOS) How people feel about the traffic How people feel is based on many things Speed Travel time Ability to maneuver Traffic interruptions Comfort Convenience http://www.youtube.com/watch?v=qMq3w7RVnvc
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LOS A through F ranking A – free-flow conditions Users are unaffected by others in the traffic stream B – near free-flow conditions Presence of others in the traffic stream is noticeable (speed unaffected,
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10 - Chapter6-Introduction to HCM and LOS - Introduction to...

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