The Civil Engineering Contractor July 2018 | Page 21

ON SITE
Table 1: Traffic count data
Site
CTO
Station
no. Direction
of traffic
Proefplaas IC
SB On 1867 Proefplaas IC
N4 EB
Traffic volume data
Average
daily traffic
(ADT) Average daily
truck traffic
(ADTT) Percentage
of trucks
SB 65818 4859 7.4
1461 EB 48911 2276 4.7
Proefplaas IC
N4 WB 1462 WB 40894 1756 4.3
Watermeyer
St I/C 677 EB 41308 3190 7.7
WB 42622 2894 6.8
Rossouw St
I/C 678 EB 32666 2883 8.8
WB 35815 2324 6.5
Simon
Vermooten 679 EB 16569 1000 6.0
951 WB 20996 1080 5.1
691 EB 21875 1635 7.5
WB 23910 1591 6.7
Hans
Strijdom Dr
I/C*
*Hans Strijdom Drive is the old name for Solomon Mahlangu Drive, but still the name of the CTO Station.
Van Rensburg adds, “This project is
a reseal, that is why it is 25mm and
this specific stone mastic asphalt is
intended to carry heavy traffic, made
specifically for this project by National
Asphalt.” He refers to the project’s
documentation, which shows that at
the Proefplaas intersection where it
joins the N1 for example, the traffic
volumes reach 60 000–70 000 vehicles
a day, of which 7.4% are trucks.
Under standably,
diver ting
this amount of traffic around the
roadworks requires detailed, planned
operations, Van Rensburg stresses.
This traffic challenge is exacerbated
by the average South African driver’s
mentality, where a shortcut is the
norm, jumping lanes a given, and
intolerance the standard, Van Wyk
points out.
The project is proceeding on time
and both KPMM and National Asphalt
are confident that it will be completed
within its time frame. nn