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    Transportation Engineering Module Exam

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    Andrew Portugal
    1. The maximum number of crashes per year at an intersection before corrective action is taken is 27. 2. The average headway for each bus in the separate bus lane is 2 minutes. 3. The traffic data shows fatalities, injuries, and property damage from 1976 to 1980, with some data missing from the table.

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    Transportation Engineering Module Exam

    Uploaded by

    Andrew Portugal
    558 views2 pages
    1. The maximum number of crashes per year at an intersection before corrective action is taken is 27. 2. The average headway for each bus in the separate bus lane is 2 minutes. 3. The traffic data shows fatalities, injuries, and property damage from 1976 to 1980, with some data missing from the table.

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    TRANSPORTATION-ENGINEERING-MODULE-EXAM

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    1. The maximum number of crashes per year at an intersection before corrective action is taken is 27. 2. The average headway for each bus in the separate bus lane is 2 minutes. 3. The traffic data shows fatalities, injuries, and property damage from 1976 to 1980, with some data missing from the table.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    558 views2 pages

    Transportation Engineering Module Exam

    Uploaded by

    Andrew Portugal
    1. The maximum number of crashes per year at an intersection before corrective action is taken is 27. 2. The average headway for each bus in the separate bus lane is 2 minutes. 3. The traffic data shows fatalities, injuries, and property damage from 1976 to 1980, with some data missing from the table.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 2

    TRANSPORTATION ENGINEERING MODULE EXAM

    1. The maximum allowable rate of crashes at intersections is 9 per million entering


    vehicles. At an intersection of two roadways, the average daily traffic values are 10,000
    and 8265. Determine the maximum number of crashes per year before corrective action
    is taken.
    2. A separate bus lane is proposed to replace a single freeway lane with a capacity of 2000
    veh/hr. If the auto occupancy is 1.5 passengers per vehicle and the bus capacity is 50
    passengers, determine the average headway for each bus.
    3. The following 5-year traffic data was recorded in the year 1976 and due to its age, some
    of the data were erased. It is also known that the data follows a certain pattern
    corresponding to the year it was taken.
    PROPERTY
    YEAR FATAL INJURED
    DAMAGE
    1976 2 24 31
    1977 72
    1978 50 496
    1979 250 648
    1980 7936

    SITUATION 1. After observing arrivals and departures at a highway toll booth over a 60-minute
    time period, an observer notes that the arrival and departure rates (or service rates) are
    deterministic, but instead of being uniform, they change over time according to a known function.
    The arrival rate is given by the function λ(t) = 2.2 + 0.17t − 0.0032t2, and the departure rate is
    given by μ(t) = 1.2 + 0.07t, where t is in minutes after the beginning of the observation period and
    λ(t) and μ(t) are in vehicles per minute. Assuming D/D/1 queuing.
    4. Determine the total vehicle delay in veh-min.
    5. Determine the time at which the maximum queue length occurs.
    6. Determine the longest queue length.
    SITUATION 2. 40 vehicles pass a given point in 1 minute and traverse a length of 1 kilometer
    7. Evaluate the flow, in vehicles per hour.
    8. Evaluate the density in vehicles per kilometer
    9. Evaluate the time headway in seconds. (Hint: headway = 1/density)

    10. If 2340 vehicles per hour passes a certain highway, with average speed of 52kph,
    determine the appropriate spacing of these vehicles.
    11. The number of accidents for 6 years recorded in a certain section of a roadway is 5892.
    If the average daily traffic is 476, what is the accident rate per million entering vehicles?
    12. Given five observed velocities in kph: 60, 35, 45, 20, 50, determine the time mean
    speed.
    13. Given five observed velocities in kph: 60, 35, 45, 20, 50, determine the space mean
    speed.
    SITUATION 3. A simple curve have tangents AB and BC intersecting at a common point B. AB
    has an azimuth of 180 and BC has an azimuth of 230. The stationing of PC is 10+140.26. If the
    degree of curve is 4-degrees.
    14. Compute the length of the long chord from A.
    15. Compute the tangent distance AB of the curve.
    16. Compute the stationing of point x on the curve which a line passing through the center of
    the curve makes an angle of 58 with the line AB, intersects the curve at x

    SIUTATION 4. Two tangents converge at an angle of 30-degrees. The direction of the second
    tangent is due east. The distance of the PC from the second tangent is 116.50m. The bearing of
    the common tangent is S40E.
    17. Compute the central angle of the first curve.
    18. If a reversed curve is to connect these two tangents, determine the common radius of
    the curve.
    19. Compute the stationing of the PT if PC is at station 10+620.

    SITUATION 5. A symmetrical parabolic summit curve connects two tangents of 6% and -4%. It
    is to pass through point P on the curve at station 25+140 having an elevation of 98.134m. If the
    elevation of the grade intersection is 100m, with a stationing of 25+160
    20. Compute the length of the curve.
    21. Compute the stationing of the highest point of the curve
    22. Compute the elevation of station 25+120 on the curve.

    SITUATION 6. A spiral 80m long connects tangents with a 6.5-degree circular curve. If the
    stationing of the T.S. is 10+000,
    23. Determine the spiral angle at the first quarter point.

    24. Determine the deflection angle at the end point


    25. Determine the offset from the tangent at the second quarter point.

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