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A four-lane freeway (two lanes in each direction) is on mountainous terrain with 11-ft lanes, a 5-ft right-side shoulder, interchange spacing of one every 10 miles, and a 60-mi/h base free-flow speed. During the peak hour, there are 12% large trucks and buses and 6% recreational vehicles. The PHF is .88 and the driver population adjustment is determined to be .90. The freeway currently operates at capacity during the peak hour in the direction of question. If an additional 11-ft lane is added (each direction) and all other factors stay the same, what will be the new level of service?
If the overall gear reduction ratio is 8 to 1, what is the maximum acceleration from rest (in ft/sec^2) for: a) the car with the base engine? b) car with the modified engine? Assume the car is on good dry pavement.
A slurry containing 20 percent by weight of limestone (CaCO 3 ) is processes to separate pure dry limestone from water. If feed rate is 2000kg/h, how much CaCO 3 is produced per hour?
On a flexible pavement with a 3 inch hot mix asphalt (HMA) wearing surface, a 6 inch soil cement base and an 8 inch crushed stone subbase, which truck will cause more pavement damage?(Suppose drainage coefficients are 1.0).
(a) Use differentiation to find a general expression for the rocket's velocity as a function of time, (b) When is the velocity zero?
Presedimentation can reduce the suspended solids concentration of raw river water from 500 mg/L to 200 mg/L. How many pounds of dry solids does this represent per million gallons?
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 difference does the tightening of bolt in the friction grip joint make to the load at first slip and the failure load.
Base isolation technique has become the method of choice for structural design of buildings and bridges located in highly seismic areas in recent years.
How many gallons of mercury (sg=13.54) would weight the same as 5 gallons of castor oil which has a specific weight of 56.69 pcf?
The 3.5-Mg engine is suspended from a spreader beam having a negligible mass and is hoisted by a crane which exerts a force of 40 kN on the hoisting cable. Determine the distance the engine is hoisted in 2.4 s, starting from rest.
The average P concentration in the runoff if the overall (agricultural and residential areas) runoff coefficient = 0.4, 40% of P is removed from the agricultural area by rainfall, and 90% of P is removed from the residential area by rainfall.
Calculate the tensile modulus of elasticity for a 10 laminated composite consisting of 62 percent by volume of unidirectional carbon fibers and an epoxy matrix under isostress conditions.
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