DOT wants to install a traffic signal at a dangerous intersection on US-51. The traffic signal...

DOT wants to install a traffic signal at a dangerous intersection on US-51. The traffic signal will cost $450,000. Based on historical data, it will eliminate, on average, one fatal accident every 10 years, but will cause 5 additional minor accidents every year. The standard cost assigned to fatal accidents is $12,300,000 and the cost assigned to minor accidents is $160,000 each. At an interest rate of 4% per year, does the B/C ratio justify the cost of the signal? Assume a useful life of 30 years for the traffic signal.

Expert Solution

Ally Wells answered 1 year ago

A traffic signal on the four-leg signalized intersection is designed based on the information below. Please...

A traffic signal on the four-leg signalized intersection is designed based on the information below. Please answer the following questions. The startup lost time per phase is 2.0 seconds, and the clearance lost time per phase is 1.5 seconds. The deceleration rate of the vehicles is 3.4 m/s2, and the average length of the vehicles is 6.0 m. The lane width of normal lane is 3.3 m, and the turn bay width is 2.8 m. Please ignore the median width...

1. On one approach of an intersection with fixed time traffic signal, vehicles arrival rate is...

1. On one approach of an intersection with fixed time traffic signal, vehicles arrival rate is 600 vehicles per hour. The effective green time for this approach is 30 seconds, the saturation flow of this approach is 1800 vehicles per hour and the cycle time of the intersection is 80 seconds. a. Evaluate the performance of the signal design i.e. will all vehicles clear during the green time? b. Recommend the changes to the green time for this approach to...

Traffic counts and signal timing data were collected for the intersection of Sand Creek Road and...

Traffic counts and signal timing data were collected for the intersection of Sand Creek Road and Wolf Road. The intersection is signalized. The collected data show that, for a particular cycle, vehicles on the through lane of the SB of Sand Creek Road had the following arrival headway pattern (counted from the start of the red time of the cycle): – 2.5 seconds for the first 10 seconds – 2 seconds for the time period of 44 ‐ 50 seconds,...

IRC procedure for design pedestarin and traffic signal in about 200words Design traffic signal by Webster...

IRC procedure for design pedestarin and traffic signal in about 200words Design traffic signal by Webster method For average flow of traffic are 400 and 250 pcu/hr. Saturation flows are 1250 and 1000 pcu/hr.. Calc all red for pedestrians in 12 sec

Given Choosing between two proposed traffic safety project intersection of a high crash rate intersection. Two...

Given Choosing between two proposed traffic safety project intersection of a high crash rate intersection. Two solutions are proposed. Project A: build a 5.57 million dollars overpass to separate the two roadways. The estimated value of the crash avoided will be 513000 per year over the next 20 years. Project B: improve the geometry and signal timing at the intersection at a cost of 418000 dollars. The estimated value of the crash avoided will be 61800 dollars per year over...

A traffic light at a certain intersection is green 50% of the time,yellow 10% of the...

A traffic light at a certain intersection is green 50% of the time,yellow 10% of the time, and red 40% of the time. A car approaches this intersection once each day. We would like to know about the number of days that pass up to and including the first time the car encounters a red light. Assume that each day represents an independent trial. a) Define the random variable of interest, it support, and parameter values. b) What is the...

5. The occurrence of traffic accidents at an intersection is modeled as a Poisson process. Based...

5. The occurrence of traffic accidents at an intersection is modeled as a Poisson process. Based on accident records at that intersection, a traffic engineer has determined that the average rate of accidents occurring at that intersection is once every three years. (a) What is the probability that no accident occurs at that intersection for a period of 5 years? (b) What is the probability that there is a traffic fatality at that intersection over a period of 3 years...

For an intersection with signal control, explain what’s included in the total lost time and the...

For an intersection with signal control, explain what’s included in the total lost time and the reasons.

1. the following information is provided for an intersection that will have signalization. calculate the signal...

1. the following information is provided for an intersection that will have signalization. calculate the signal timing for a two phase system also show the phase diagram . peak hour volumes: SB/NB/WB/EB;360/300/444/482 vph PHP; SB/NB/WB/EB:0.92/0.88/0.90/0.82 saturation flow: SB/NB/WB/EB:1500/1500/1800/1800vph distribution of vehicles for turning movements South bond North bond West bond East bond TM T R L T R L T R L T R L % of TM 90 4 6 88 7 5 84...

The US Department of Transportation (DOT) is tasked with maintaining the nation's 615,322 bridges. The US...

The US Department of Transportation (DOT) is tasked with maintaining the nation's 615,322 bridges. The US DOT believes the percentage of structurally deficient bridges is below 10%. A private civil engineering group found 11.9% of the 15,126 bridges it studied were, in fact, structurally deficient. a. What is the population of interest? b. What is the sample? c. The number 11.9% represents a _______________ . d. The number 615,322 represents a _______________. d. To state that "11.9 % of all...

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