Street Design Manual

Measures of Effectiveness: When performing analyses, providing overall intersection Level-of-Service alone is not sufficient. Items such as queuing, approach level of service, and volume–to-capacity ratio for example shall also be evaluated. The measures of effectiveness listed in Table 2 shall be used for all traffic studies unless waived by City staff.

Table 7.2 Intersection, Arterial, and Network Measures Effectiveness Signalized intersection Intersection average delay per vehicle Intersection level-of-service Approach average delay per vehicle Approach level-of-service Movement volume Percent of cycles maxed out (by phase) Maximum observed queue length Average queue length

Upstream block time (%) Storage block time (%)

Volume-to-capacity ratio (by phase) Intersection vehicle hours of delay Movement delay Movement level-of-service Movement maximum queue length

Unsignalized intersection

Arterial

Delay Travel time Speed Level-of-Service Stops per vehicle Fuel consumed Overall delay

Network

Air quality/vehicle emissions Multimodal Level-of-Service

Guidance: Measures of effectiveness for isolated intersections, all intersections along a particular road or all intersections within a roadway network can provide important information when evaluating transportation and land use alternatives. Network and Arterial MOEs are not appropriate for every study. City staff will determine the appropriate measures of effectiveness for each traffic study on a case-by-case basis.

Raleigh Street Design Manual – Page 51