roadway covered with hard packed
Assignment No. 6
snow
A car is traveling at 10 mph on a
(coefficient of road adhesion of 0.20). The car has CD = 0.30, Af = 20 ft2, and W = 3000 lb. The
wheelbase
is 120 inches, and the center of gravity is 20 inches above
CEE207T
TransportationEngineering
gHom
meworkNo.6
6Solution
Fall
l2013
Departme
entofCivil&EnvironmentalEngineerin
ng
LehighUniv
versity
Assignme
entNo.6,Due
eMonday,October7thinclass.Total6
60points
Problem 1(20 points) A car is tra
)
aveling at 10 mph o
Problem 4:
Vehicles arrive at a highway (US22) cross section with 2lanes per direction at a flow rate of
2000 vphpl. The highway capacity is 2400 vphpl.
Assume that an accident happens and consider
Assignment No. 9,
Basic overview, configuration and relationships for horizontal curve alignment and design:
D
M R 1 cos
LC 2R sin
2
ER
2
L
1
100
D
1
cos 2
5729.6
R
T R tan
2
Rv
2
V
g f s e
Spiral
Curves:
Flat
3.15 V
3
Ls
RC
3.15V V 2
Banked
L
R
1
R M
Problem 1
Suppose that Lehigh gets a new President who wants the STOP signs removed from the
University Walk pedestrian crossing of Packer Avenue (near the bus stop). Name at least two
traffic calming improvements that would be appropriate to be installed