Unformatted text preview: 2/13/2019
NUMBER OF LANES
The basic task in designing highways is the
determination of the number of lanes needed to
1. A proposed highway is to be designed with
meet the given design volume under a specified
adequate shoulder clearance in a level of terrain
with the following:
AADT= 40 000 pcu/day
The procedure may follow trial and error. Thus, the
D = 65%
anumber of lanes is initially assumed. (validate
"assumption from the corresponding capacity
Estimate the number of lanes that will
obtained from the table of values.)
provide LOS B.
2. Five vehicles were traversing a 2- km
highway and the following data were take:
1 . 6
1 . 3
#) Find the density of traffic in veh/km.
Find the space mean speed in kph.
Compute the time mean speed in kph....
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- Spring '15