1 - HKU Libraries

T.P.D.M.V.2.4
to the ri ht for
£
vehicles waiting in stream B-A
visibllit to the left for
y
vehicles waiting in stream B-A,
and so on
) Visibility distances for
) minor road flow is
) measured from a point 10m
) back from the give way
) line
All distances and widths are measured in metres and the ranges of
parameters in the data base were as follows :-
w = 2.05 - 4.70
V
r
= 17.0 - 250.0
V I = 22.0 - 250.0
W CR
= 1.2 - 9.0 (kerbed central reserve only)
W r 6.4 - 20.0
The maximum values of visibility and V used in calculation and
OjK
computation should be 250m and 10m respectively, even if greater values
are physically provided.
N.B.
(i) The equations for Q and Q assume separate lanes for right
and left turning minor road traffic and no simultaneous queueing for
the two movements.
If simultaneous queues are sometimes present
Q B-A is unaffected but the operational left turning capacity
is :~
*B-C V for < 1
B-A
and
B-C
for > 1
4 -A