sr 60 “twin pairs” - City of Vero Beach

HCM Signalized Intersection Capacity Analysis
3: 20 Avenue SB & SR 60 WB
11/13/2012
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (vph) 0 0 0 44 1126 0 0 0 0 0 150 65
Ideal Flow (vphpl) 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900
Total Lost time (s) 4.0 3.0
Lane Util. Factor 0.91 0.95
Frt 1.00 0.96
Flt Protected 1.00 1.00
Satd. Flow (prot) 4568 3069
Flt Permitted 1.00 1.00
Satd. Flow (perm) 4568 3069
Peak-hour factor, PHF 1.00 1.00 1.00 0.71 0.74 1.00 1.00 1.00 1.00 1.00 0.58 0.78
Adj. Flow (vph) 0 0 0 62 1522 0 0 0 0 0 259 83
RTOR Reduction (vph) 0 0 0 0 5 0 0 0 0 0 29 0
Lane Group Flow (vph) 0 0 0 0 1579 0 0 0 0 0 313 0
Turn Type Prot NA NA
Protected Phases 4! 4 6! 7!
Permitted Phases
Actuated Green, G (s) 84.9 17.4
Effective Green, g (s) 87.9 18.4
Actuated g/C Ratio 0.73 0.15
Clearance Time (s) 4.0
Vehicle Extension (s) 3.0
Lane Grp Cap (vph) 3498 470
v/s Ratio Prot c0.11 c0.10
v/s Ratio Perm 0.24
v/c Ratio 0.45 0.67
Uniform Delay, d1 6.4 47.9
Progression Factor 2.86 1.00
Incremental Delay, d2 0.1 3.6
Delay (s) 18.4 51.5
Level of Service B D
Approach Delay (s) 0.0 18.4 0.0 51.5
Approach LOS A B A D
Intersection Summary
HCM 2000 Control Delay 24.3 HCM 2000 Level of Service C
HCM 2000 Volume to Capacity ratio 0.51
Actuated Cycle Length (s) 120.0 Sum of lost time (s) 14.3
Intersection Capacity Utilization 38.7% ICU Level of Service A
Analysis Period (min) 15
! Phase conflict between lane groups.
c Critical Lane Group
PM Peak 5:00 pm 11/7/2012 2035 no-build conditions Synchro 8 Report
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