System Efficiency: Intensity of Congestion (Travel Time Index) (Objective Category)

This objective focuses on managing the intensity of traffic congestion experienced by the traveling public. Congestion is measured using a travel time index, which compares travel conditions in the peak period to travel conditions during free-flow or posted speed limit conditions. For instance, a travel time index of 1.30 indicates that it typically takes 30 percent longer in the peak period than during the off-peak period. The objectives focus on the actual experience of travelers and can be multimodal if transit travel time is included in the measure.

Associated Objectives and Performance Measures

Objective Performance Measure
Reduce the regional average travel time index by X percent per year. Travel time index (the average travel time during the peak period, using congested speeds, divided by the off-peak period travel time, using posted or free-flow speeds).

Associated Planning Factors and Goals

Planning Factor Goal
G. Promote efficient system management and operation; Improve the efficiency of the surface transportation system

Associated Service Packages

Service Package
CVO06: Freight Signal Priority
MC06: Work Zone Management
PT09: Transit Signal Priority
PT14: Multi-modal Coordination
PT18: Integrated Multi-Modal Electronic Payment
ST06: HOV/HOT Lane Management
TI01: Broadcast Traveler Information
TI02: Personalized Traveler Information
TI03: Dynamic Route Guidance
TI04: Infrastructure-Provided Trip Planning and Route Guidance
TI06: Dynamic Ridesharing and Shared Use Transportation
TI07: In-Vehicle Signage
TM03: Traffic Signal Control
TM04: Connected Vehicle Traffic Signal System
TM05: Traffic Metering
TM06: Traffic Information Dissemination
TM07: Regional Traffic Management
TM09: Integrated Decision Support and Demand Management
TM10: Electronic Toll Collection
TM15: Railroad Operations Coordination
TM16: Reversible Lane Management
TM18: Drawbridge Management
TM20: Variable Speed Limits
TM21: Speed Harmonization
TM22: Dynamic Lane Management and Shoulder Use
VS05: Curve Speed Warning
VS08: Queue Warning
VS09: Reduced Speed Zone Warning / Lane Closure
VS10: Restricted Lane Warnings
VS12: Pedestrian and Cyclist Safety
VS15: Infrastructure Enhanced Cooperative Adaptive Cruise Control
VS16: Automated Vehicle Operations

Source

Planning for Operations Desk Reference



 
Since the mapping between objectives and service packages is not always straight-forward and often situation-dependent, these mappings should only be used as a starting point. Users should do their own analysis to identify the best service packages for their region.