20 2026 01 21 Eagle Rock Ave and Oval Road Laurel Avenue Traffic Signal Design Report

ANALYSIS OF TRAFFIC OPERATIONS This section describes the capacity analysis we conducted to assess traffic operations for the Build (Unsignalized) and Build (Signalized) conditions. Capacity analysis provides an indication of the adequacy of road facilities to serve traffic demand. Level of Service Criteria Level of Service (LOS) is the term used to denote different operating conditions that occur on a given road segment under various traffic-volume demands. LOS is a qualitative measure that considers a number of factors including road geometry, speed, travel delay and freedom to maneuver. LOS designations range from A to F and provide an index of operational qualities of a road segment or an intersection. LOS A represents the best operating conditions; LOS F represents the worst. LOS designations are reported differently for signalized and unsignalized intersections. For signalized intersections, the analysis considers the operation of all traffic entering the intersection. For unsignalized intersections, the analysis considers the operation of all movements that conflict with other movements, such as main-line left turns and traffic exiting a side street. The evaluation criteria used to analyze the study area intersections are based on the Highway Capacity Manual, 6th edition, (HCM), published by the Transportation Research Board and the Synchro and HCS programs. The HCM defines LOS for signalized intersections as follows: LOS Control Delay per Vehicle A ≤10 sec B >10 and ≤20 sec C >20 and ≤35 sec D >35 and ≤55 sec E >55 and ≤80 sec F >80 sec The HCM defines LOS for unsignalized intersections as follows: LOS Delay Range (sec/veh) A ≤10 sec B >10 and ≤15 sec C >15 and ≤25 sec D >25 and ≤35 sec

B >10 and ≤15 sec C >15 and ≤25 sec D >25 and ≤35 sec E >35 and ≤50 sec F >50 sec 7