sr 60 “twin pairs” - City of Vero Beach

HCM Signalized Intersection Capacity Analysis
1: 20 Avenue SB & SR 60 EB
11/13/2012
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Volume (vph) 0 792 68 0 0 0 0 0 0 28 170 0
Ideal Flow (vphpl) 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900 1900
Lane Width 12 11 12 12 12 12 12 12 12 12 12 12
Total Lost time (s) 4.3 4.0
Lane Util. Factor 0.91 0.95
Frt 0.99 1.00
Flt Protected 1.00 0.99
Satd. Flow (prot) 4374 3168
Flt Permitted 1.00 0.99
Satd. Flow (perm) 4374 3168
Peak-hour factor, PHF 1.00 0.71 0.75 1.00 1.00 1.00 1.00 1.00 1.00 0.75 0.58 1.00
Adj. Flow (vph) 0 1115 91 0 0 0 0 0 0 37 293 0
RTOR Reduction (vph) 0 7 0 0 0 0 0 0 0 0 59 0
Lane Group Flow (vph) 0 1199 0 0 0 0 0 0 0 0 271 0
Turn Type NA Split NA
Protected Phases 2 3 3
Permitted Phases
Actuated Green, G (s) 58.0 19.3
Effective Green, g (s) 59.0 20.3
Actuated g/C Ratio 0.49 0.17
Clearance Time (s) 5.3 5.0
Vehicle Extension (s) 3.0 3.0
Lane Grp Cap (vph) 2150 535
v/s Ratio Prot c0.27 c0.09
v/s Ratio Perm
v/c Ratio 0.56 0.51
Uniform Delay, d1 21.4 45.3
Progression Factor 1.00 0.14
Incremental Delay, d2 1.0 0.7
Delay (s) 22.4 7.1
Level of Service C A
Approach Delay (s) 22.4 0.0 0.0 7.1
Approach LOS C A A A
Intersection Summary
HCM 2000 Control Delay 19.1 HCM 2000 Level of Service B
HCM 2000 Volume to Capacity ratio 0.40
Actuated Cycle Length (s) 120.0 Sum of lost time (s) 14.8
Intersection Capacity Utilization 31.8% ICU Level of Service A
Analysis Period (min) 15
c Critical Lane Group
PM Peak 5:00 pm 11/7/2012 2035 no-build conditions Synchro 8 Report
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