Incorporating Truck Analysis Into the HCM - Proposed Truck LOS Model Rick Dowling Kittelson & Associates HCQS Presentation 1/12/14 1

The Project NCFRP 41 is a 2-year, $500,000 project to: ◦ Develop improved capacity and LOS techniques for incorporation into the HCM that:  Improve agencies’ abilities to plan, design, manage, and operate streets and highways to serve trucks, and  Better evaluate the effects of trucks on other modes of transportation and vice versa. ◦ Techniques are needed for uninterrupted and interrupted flow facilities in both rural and urban conditions. 2

NCFRP 41 Panel Tom Creasey, Chair, Stantec Ted Dahlburg, DVRPC (Philadelphia) Rebekah Karasco, North Central Texas COG Douglas MacIvor, Caltrans Mitsuru Saito, Brigham Young University Tyrone Scorsone, Florida DOT Jin Wang, Atkins Quon Kwan, FMCSA (Liaison) Richard Cunard, TRB (Liaison) 3

NCFRP 41 Research Team Rick Dowling, Kittelson & Associates Alexander Skabardonis – Kittelson & Associates George List – ITRE Bo Yang - ITRE Aimee Flannery – Working Energy Enterprises Erika Witzke – Cambridge Systematics 4

Status Draft LOS Models Vetted at ◦ Philadelphia Workshop ◦ Sacramento Workshop Submitted January 2014 ◦ Computational Engines (LOS & PCE) ◦ Example Applications ◦ Recommended HCM Updates ◦ Draft Final Report 5

Truck LOS Model Objectives Sensitive to the facility performance measures that are most important to truck freight shippers, receivers and motor carriers (not drivers). Must provide actionable information to public agencies for prioritizing truck improvements on a facility. 6

Approach Survey preferences of shippers/carriers. Fit model. Adapt model to HCM analysis needs. Evaluate models on case studies Run models by planning professionals Revise and select final model. 7

Facility Freight Class System ClassDescriptionExamples 1 Facility critical to economy of region -Interstate Freeway -Inter-regional arterial 2 Facilities of secondary importance to region -Urban Principal Arterial -Connectors to Intermodal Terminals (ports, etc.) 3 Facilities of tertiary importance to region -Access roads to major freight sources (factories, mines, etc.) 8 Criteria: Truck volumes, Truck percentage, Tons of freight on facility, Value of freight on facility MAP-21 Freight facility classification system

Truck LOS Thresholds LOSClass I (Primary) Class II (Secondary) Class III (Tertiary) A90%85%80% B 75%70% C 65%60% D 55%50% E 45%40% F< 50%<45%<40% 9 Criteria: Minimum percent achievement of agency defined goals for facility class

The Truck LOS Model 10

Truck LOS Curve 11

Probability of On-Time Arrival Set equal to probability of HCM LOS F POTA = Probability of HCM LOS F ◦ LOS F on Freeways at TTI =1.33 ◦ LOS F on Urban Streets at TTI = 3.33 (2.50) 12

Truck Travel Time Index Ratio of ◦ free-flow truck speed to ◦ average truck speed during study period (excluding incidents, weather). Free-flow truck speed is: ◦ A value over or under posted speed limit ◦ Max. sustainable speed on upgrade 13

Truck Friendliness Index Agency discretion ◦ 1.0 = no at-grade RXR, all legal loads carried ◦ 0.6 = LOS F, unacceptable, regardless. Options ◦ Combination of:  Percent trucks with legal loads and size allowed on facility  Percent trucks that do not have to stop for at- grade railroad crossings 14

Interstate Freeway Site 15

Interstate Freeway Example 16 Segment #1Segment #2 Facility Class II HCM Facility TypeFreeway Length (mi) Auto Free-Flow Speed (mph)6555 Actual Truck Speed (mph) th% TTI (Mixed Flow) th% TTI (Mixed Flow) Truck Toll ($)$0.00 Truck Friendliness Index1.00 Truck Free-Flow Speed Truck TTI Prob. On Time Arrival (POTA)52%62% x (utility) % TLOS29.6%51.1% LOSFE

Truck Free-Flow on Upgrades 17 Exhibit11-A1 – HCM 2010 (200 lbs/hp)

Probability of On-Time Arrival 18

Arterial/Rural Hwy Site 19

Arterial/Rural Hwy Example 20 Segment #1Segment #2Segment #3Segment #4 Facility Class II III HCM Facility TypeUrban StreetMulti-Lane Hwy 2-Lane Hwy Length (mi) Auto Free-Flow Spd (mph) Actual Truck Speed (mph) th% TTI (Mixed Flow) th% TTI (Mixed Flow) Truck Toll ($)$0.00 Truck Friendliness Index Truck Free-Flow Speed Truck TTI Prob. On Time Arrival94%88%95%94% x (utility) % TLOS64.7%79.7%84.9%54.4% LOSDBAD

Questions/Comments Rick Dowling – 21