Question

Question 4 4.1 A 2-lane road has a circular curve with a radius of 210 m, curve length of 300 m. The lane width and shoulder width are 3.6 and 1.8 m, respectively. The design speed on the road section is 80 km/h and minimum required SSD is 115 m. Determine the minimum acceptable distance of a building structure from the edge of the road. (4)

4.2 An 80 km/h rural road section has a three-leg intersection. Assume a WB50 design vehicle, determine the required shoulder sight distance for both stop and yield conditions. Show how you reach to the answers. (4) [8 Marks]

Answer #1

A minor road intersects a major 4-lane divided road with a
design speed of 55mph and a median width of 8 feet. The
intersection is controlled with a stop sign on the minor road. If
the design vehicle is a passenger car, determine the minimum sight
distance required on the major road that will allow a stopped
vehicle on the minor road to safely turn left if the approach grade
on the minor road is 3%.

ou are asked to design a horizontal curve for a two-lane road.
The road has 12-ft lanes. Due to expensive excavation, it is
determined that a maximum of 35 ft can be cleared from the road’s
centerline toward the inside lane to provide for stopping sight
distance. Also, local guidelines dictate a maximum superelevation
of 0.08 ft/ft.
Determine the design speed for this curve (mph)?

Question 5 5.1 determine the distance travelled by a driver
during the perception reaction time, if she/he maintains 85 km/h.
Use TRH17 recommendations for the design value of driver
perception-reaction time. (2) 5.2 If the design speed of a 4-lane,
rural road is 100 km/h, determine the minimum sight distance that
should be provided on the road if (a) the road is levelled and (b)
the highway has an entry grade of + 5% and an exit grade of -...

a highway curve for a rural two-lane road connects front and
back tangents at Station 74+30 at an angle (delta) of 38 degrees
16’ 31”. using the maximum allowable superelevation for the
curve,(a) what would be its minimum radius for design for a posted
speed of 55mph? (b) What would be the station locations of the PC
and PT for this curve? (c) If the inner radius was kept clear of
all visual obstructions out to a distance of 45...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 1 minute ago

asked 30 minutes ago

asked 42 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago