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

2. ITS Lab Members Assess optimal stop spacing considering access cost and riding & stopping cost 2 Huan Li Transit Service Evaluation On- Board Computer Radio Doors Lift APC (Automatic Passenger Counter) Overhead Signs Odometer Signal Priority Emitters Stop Annunciation Memory Card Radio System Garage PC’s Radio Antenna GPS Antenna Navstar GPS Satellites Control Head 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

3. ITS Lab Members 3 Huan Li Transit Service Evaluation

4. ITS Lab Members 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 Traffic Flow Features on HOV lane 4 Huan Li

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