Newlands Cross Upgrade EIS - European Investment Bank

South Dublin County Council N7 Newlands Cross Upgrade
Environmental Impact Statement
Arup Consulting Engineers
Table 5.3: Traffic Capacity Results: 2025 Peak Hours: Do-Minimum
Junction Approach Link
Demand
Flow
(pcu)
Capacity
(pcu)
Deg Sat
(%)
Av.
Delay
Per Veh
(s/pcu)
Mean
Max
Queue
(pcu)
Naas Road (Eastbound) Left Ahead 3618 2320 155.9 735.8 773.3
Naas Road (Eastbound) Right 165 1160 14.2 23.5 3.0
AM Fonthill Road Right Left Ahead 1133 880 128.7 489.3 168.7
peak Naas Road (Westbound) Ahead 2968 2100 141.3 599.0 536.0
Naas Road (Westbound) Right 823 700 117.6 329.7 88.3
Naas Road (Westbound) Left 101 700 14.4 20.8 1.7
Belgard Road Ahead Right 1024 660 155.2 744.6 224.6
Belgard Road Left 285 220 129.5 511.5 44.2
Naas Road (Eastbound) Left Ahead 3465 2080 166.6 818.1 820.7
Naas Road (Eastbound) Right 291 1040 28.0 27.2 5.8
PM Fonthill Road Right Left Ahead 2420 2080 116.3 316.8 249.0
peak Naas Road (Westbound) Ahead 3231 1560 207.1 1048.1 971.2
Naas Road (Westbound) Right 577 520 111.0 250.7 48.7
Naas Road (Westbound) Left 401 520 77.1 44.0 10.8
Belgard Road Ahead Right 693 480 144.4 642.7 131.5
Belgard Road Left 143 160 89.4 118.3 6.6
Note: pcu=passenger car unit; car=1 pcu; HGV=3 pcu
Degree of Saturation=flow/capacity
December 2007 Page 90