chapter 3 rigid pavement - DOT On-Line Publications - Department ...

from the siab edge. The number of trucks within I:! in (305 rr.m) oi the siab edge :5
approximately 10 percent (Figure 4).‘” This is a significant number 0i trucks
traveiling at the edge of the KC pavements and, if these results can be considered
representative of t,he rest of the country, indicates that a large number of edge
loadings are not being considered in most ot’ the State highway agencies desip.
processes.
It shouid also be noted that none of the trucks sampied in the wldened lane
pavement test sections traveled on to the KC pavement edge or AC shoulder. X
small percentage did encroach on the edge lane stripe, but none went to the
pavement edge itself.
Figures 4, 5, and 6 show the data collected for each test section and the controi
section.“’ These once again show that the average distance from the edge stripe is
between 20 and 22 in (508 and 559 mm). A significant percent of the truck traffic
does travel within 18 in ,(457 mm) of the KC slab edge on the control section. The
extended PCC pavement slab sections had very little traffic within 18 in (437 mm) of
the edge of the KC slab. This can be seen clearly in the graphs of the distribution of
trucks, as indicated by the mean lateral distribution (x).
Photo 3 - A truck travelling near the edge of pavement. Note the pavement edge
stripe location (12-ft PCC pavement slabs).
3.8.13