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A traffic engineer is trying to design a left turn bay on an EB approach to an intersection. The signal timing for left turns will have 10 seconds of "left turn only" green time and 50 seconds of red time each signal cycle. The green time will be sufficient to allow three left turns to be made each signal cycle. An average of 2.5 left-turning vehicles are expected to approach the intersection each signal cycle. Space is limited, so the engineer wants to minimize the storage capacity of the turn bay, but insufficient capacity will cause the excess vehicles waiting for a green light to block through traffic. If the turn bay has capacity for only three vehicles, what percentage of the time will the through lane adjacent to the left-turn bay be blocked?
Engineering ethics concepts and cases
Civil and Environmental Engineering Question, 1. How is the problem of technology choice related to process selection and product design?
To what maximum angle, measured from vertical, does the rod (with the attached ball of clay) rotate?
Hardness is sum of all divalent cations (meaning all species with a positive charge of 2) in a water sample. Magnesium (Mg2+) and calcium (Ca2+) are the most common divalent cations that contribute to hardness.
A tape is calibrated and found to measure 100.04ft between the 0- and 100-ft marks. What measurements should be laid out to establish a horizontal distance of 682.25ft?
A hawk flying at 2 m/s at an altitude of 45 m accidentally drops its prey. The parabolic trajectory of the falling prey is described by the equation below until it hits the ground, where y is its height above the ground and x is its horizontal dis..
what is the final dissolved oxygen concentration (in mg/L) in the waste lagoon after all of the ammonium (NH4 + ) is converted to nitrate? Recall that 4.57 mg of O 2 is need per mg of ammonium (as N) oxidized during nitirification. After all of the..
Compute the maximum acceptable service load on an A36 steel plate tension member 1/4in.x12in. having a single line of holes parallel to the direction of loading. The load is 25% dead load and 75% live load, and 7/8in. diameter bolts are used.
What is the length of a 2 degree increment along a (A) meridian and (B) parallel at 45N and 115W. Assume the radius of Earth is 6370 km.
A rectangular clarifier with a length:width ratio of 3:1 receives a flow of 850m3/day. the clarifiers depth is 4.0m and the detention time of the water inthe clarifier is 2.4 hrs, what are the surface overflow rate and the horizontal flow through ..
The entrance to Mt. Hood Meadows (elevation 3,075 ft at the point of crossing) is grade separated from Viking highway (elevation 3,050 ft at the point of crossing) and will have to be connected. The two roadways intersect at a right angle.
What do you understand by the term durability? Compared to other considerations, how much importance should be given to durability in the design and construction of concrete structures?
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