Objective Category
System Reliability: Variability

Objectives in this category focus on improving travel time reliability by trying to reduce the variability of travel time.

Associated Objectives and Performance Measures

Objective Performance Measure
Reduce the variability of travel time on specified routes by X percent during peak and off-peak periods by year Y. Variance of travel time. Variance is the sum of the squared deviations from the mean. This can also be calculated as the standard deviation of travel time. Standard deviation is the square root of variance.

Associated Planning Factors and Goals

Planning Factor Goal
G. Promote efficient system management and operation; Improve the efficiency of the surface transportation system
I. Improve the resiliency and reliability of the transportation system and reduce or mitigate stormwater impacts of surface transportation; Improve the resiliency and reliability of the surface transportation system

Associated Service Packages

Service Package
MC04: Winter Maintenance
MC06: Work Zone Management
TI01: Broadcast Traveler Information
TI02: Personalized Traveler Information
TI03: En-Route Guidance
TI07: In-Vehicle Signage
TM03: Traffic Signal Control
TM04: Connected Vehicle Traffic Signal System
TM05: Traffic Metering
TM06: Traffic Information Dissemination
TM08: Traffic Incident Management System
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

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.