At what point on the expressway should the motorist

Reference no: EM13559346

A motorist traveling at 55 mph on an expressway intends to exit from the expressway using an exit ramp with a maximum allowable speed of 30 mph. At what point on the expressway should the motorist step on her brakes in order to reduce her speed to the max allowable ramp speed? Assume the coefficient of friction between the pavement and tires is .3 and the alignment of this section of the road is horizontal.

For this particular problem we can ignore the friction value and just use a standard deceleration rate of 11.2 ft/sec.

Reference no: EM13559346

Questions Cloud

Estimate the weight of concrete in a four-lane highway : Estimate the weight of concrete in a four-lane highway segment that begins as a 3% grade climb from 1000 feet altitude to 4000 feet and then a 6% downgrade to 2500 feet

Highlight the area of the graph that represents work : Consider a piston-cylinder device. Within this device, a quasi-equilibrium process occurs for which the pressure changes according to the equation p = 300V2 + 1000 V + 1000, with p, pressure, in psfa, and V, volume

What length of the existing level highway must be reconstruc : At a railroad crossing, an overpass must be built centered over the tracks at a height of 24ft and be 200ft long. the existing highway has a design speed of 50mi/hr. what length of the existing level highway must be reconstructed to provide an approp..

Find the pollutant concentration leaving each pond : The two-pond system shown below is fed by a stream with a flow rate of 1.0 MGD and a non-conservative pollutant concentration of 20.0 mg/L. The rate of biological consumption is 0.3 day-1.

At what point on the expressway should the motorist : A motorist traveling at 55 mph on an expressway intends to exit from the expressway using an exit ramp with a maximum allowable speed of 30 mph. At what point on the expressway should the motorist step on her brakes in order to reduce her speed to th..

Determine the drivers perception/reaction time before : A test of a driver’s perception/reaction time is being conducted on a special testing track with wet pavement and a driving speed of 55 mph. When the driver is sober, a stop can be made just in time to avoid hitting an object that is first visible 52..

What distance away from the truck was he when he first : A motorist traveling at 55 mph down a grade of 5% on a highway observes an accident involving an overturned truck ahead of him which completely blocked the road

Find when and the distance that a catches up with b : Two objext A and B are moving along the same line. At the time t=0, B is 75ft ahead of A. The acceleration of A is 1.8ft/s^2 and the acceleration of B is -1.3ft/s^2. The velocity of A is 32ft/s and the velocity of B is 51ft/s.

How do you classify a structure as determinant : If the design speed of a multilane highway is 60 mph, what is the minimum sight distance that should be provided on the road if (a) the road is horizontal and (b) the road has a maximum grade of 5%? Assume the perception/reaction time is 2.5 seconds...

User Account

All Pages