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Huan Li

Huan Li. Ph.D Student in Civil Engineering Areas of Interest Freeway Management and Operation Transit Operation Intelligent Transportation System Climate Change. Navstar GPS Satellites. Radio System. Radio Antenna. GPS Antenna. Doors Lift APC (Automatic Passenger Counter)

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Huan Li

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  1. Huan Li • Ph.D Student in Civil Engineering • Areas of Interest • Freeway Management and Operation • Transit Operation • Intelligent Transportation System • Climate Change Huan Li

  2. Navstar GPS Satellites Radio System Radio Antenna GPS Antenna Doors Lift APC (Automatic Passenger Counter) Overhead Signs Odometer Signal Priority Emitters Stop Annunciation On- Board Computer Control Head MemoryCard Radio Garage PC’s Transit Service Evaluation • Assess optimal stop spacing considering access cost and riding & stopping cost • Use high resolution archived stop-level data • One year’s worth of data • Referring all routes in Portland Metropolitan region every trip every bus stop event Huan Li

  3. Transit Service Evaluation Huan Li

  4. Traffic Flow Features on HOV lane • Analyze lane changing effect on speed using lane by lane oblique curve • “history data” • Automatically identify HOV lane merging and diverging features • Indicator: piece wised linear regression for curve fitting • Endogenous Model vs. Extraneous Model Huan Li

  5. Traffic Flow Features on HOV lane • Next step: compose oblique method with threshold based identification method • Other applications: incident detection, bottleneck identification…. Huan Li

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