Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Chapter 4, Problem 22P
To determine
The number of parking bays in the parking lot.
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Data collected at a parking lot indicate that a total of 300 cars park between 8 a.m. and 6 p.m. 10% of these cars are parked for an average of 2 hr, 30% for an average of 4 hr, and the remaining cars are parked for an average of 10 hr.
1. Determine the space-hours of demand at the lot.
Data collected at a parking lot indicate that a total of 300 cars park between 8 a.m. and 5 p.m. 5% of these cars are parked for an average of 2 hr, 20% for an average of 3 hr, 10% for an average of 4 hr, and the remaining cars are parked for an average of 9 hr. (a) Determine the space-hours of demand at the lot. (b) If 10% of the parking bays are vacant on average (between 8 a.m. and 5 p.m.) at the parking lot, determine the number of parking bays in the parking lot. Assume an efficiency factor of 0.90. (c) The owner of the parking lot is planning an expansion of her lot to provide adequate demand for the following 10 years. If she has estimated that parking demand for all categories will increase by 3% a year, determine the number of additional parking bays that will be required.
1. A total of 5,000 person-trips are made between a commercial district and a residential area during
the PM peak hour. Commuters have two modes available, including private automobile and a light-
rail transit system. The following utility function was calibrated using data from the study area from
users of these two modes:
U 3D -0. 50T1 — 0. 50T, — 2. 00С
Data summarizing the operational characteristics and costs associated with each mode are provided in
the following table.
Private
Light-Rail
Parameter
Automobile
Transit
= in-vehicle travel time (min.)
10
T1
T2 = excess time (min.)
C = out-of-pocket cost (dollars)
15
5
10
5.00
2.00
Determine how many trips will be made by each travel mode based on these characteristics.
Chapter 4 Solutions
Traffic and Highway Engineering
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Similar questions
- PARKING STUDIES PROB 1. Data collected at a parking lot indicate that a total of 300 cars park between 8 a.m. and 6 p.m. 10% of these cars are parked for an average of 2 hr, 30% for an average of 4 hr, and the remaining cars are parked for an average of 10 hr. Determine the space-hours of demand at the lot PROB 2. If 10% of the parking bays are vacant on average (between 8 a.m. and 6 p.m.) at the parking lot of PROB1, determine the number of parking bays in the parking lot. Assume an efficiency factor of 0.85arrow_forwardThe table below shows the number of vehicles observed on a corridor over each 15-minutes during the peak hour. Peak hour (7--8am) 7:00-7:15am 7:15-7:30am 7:30-7:45am 7:45-8:00am # of vehicle 200 120 153 183 Calculate the peak hour factor and report your answer correct to two digits after the decimal.arrow_forward5. The metering scheme of a ramp meter installed along the Pampanga Subic Expressway allows one vehicle to pass the signal. The cumulative demand for the ramp for the morning peak and ramp meter cycle for each interval are shown in the table. Determine the following: Time Period ib min Cumulative Meter Cycle volume Volume 6:30 - 6:45 75 75 6 6:45 - 7:00 100 175 10 7:00 - 7:15 125 300 12 7:15-7:30 110 410 12 7:30 - 7:45 80 490 10 7:45 - 8:00 65 555arrow_forward
- When using the parking space hour supply equation, you must take into account efficiency of the facility during its highest demand period. What is the average efficiency factor that must use if you are addressing curb parking? youarrow_forwardScheduled maintenance will close two of the four westbound lanes of a freeway during one weekday for the period from 9:00 AM to 4:00 PM. The demand on the two lanes are as follows: Time Demand, vph 9:00-10:00 AM 4000 10:00-11:00 AM 3500 11:00-12:00 NN 2500 12:00-1:00 PM 2000 1:00-2:00 PM 2000 2:00-3:00 PM 2000 3:00-4:00 PM 2000 If the estimated capacity of the 4 lanes with 2 lanes open is 2960 vph, a. compute the time when maximum queue occurs. 11:00 AM b. compute the maximum queue formed. 1580 vehicles c. compute the maximum length of queue if the average length of cars is equal to 5 meters. 1975 m Show all necessary diagrams and solutions.arrow_forwardThe table below displays the data obtained from a one-hour in-out car parking survey of 100 bays. The initial count is 10 cars. The total average occupancy is about % . Time (min.) 0-10 10-20 20-30 30-40 40-50 50-60 In Out 3 4 7 6 1 2 2 3 1arrow_forward
- 2. A public administration holds its flag ceremonies every Monday from 07:00 am –07:15 am. During the singing of National Anthem –which lasts for 2 minutes –all drivers stop in front of the building as a sign of respect. a.Determine the maximum length of queue formed. b.Estimate the time required for the traffic flow to be back to normal.arrow_forward16. A bus line operates in mixed traffic and caries 4000 passengers per peak hour at an average speed of 10 mi/h. Typically each bus makes two scheduled stops per mile and is interrupted by the traffic- control system and other vehicles six times per mile. Given an average occupancy of 50 persons per bus and a 5-mi trip, calculate the number of buses needed to serve the passenger demand and the total amount of fuel consumed during a typical peak hour.arrow_forwardThrough the Walla Walla Road to the entrance of the E-1 parking lot at the University of Washington, vehicles begin to arrive from 7:40 A.M. at a uniform deterministic rate of 480 vph until 8:20 A.M. and from then on at 120 vph. It takes 10 seconds for a vehicle to go through the paying process at the gate. If the parking lot is open at 8:00 A.M., determine (a) when the queue will dissipate, (b) the total delay, (c) the average delay, (d) the maximum queue length (in vehicles), and (e) the longest vehicle delay under FIFO. Show your results graphically. [Hint: D/D/1 analysis]arrow_forward
- 7. The following table shows traffic flow data collected at the main road in an urban area, in two successive days during the peak period Day one Flow (veh) Day two Time Flow (veh) 7:30 – 7:45 7:45 – 8:00 900 950 960 8:00 – 8:15 1010 1015 8:15 – 8:30 990 980 (a) Determine the peak hour factor (PHF) (b) Estimate the missing traffic flow count (x) on day two.arrow_forwardQUESTION 2 The service flow rate is the maximum flow rate for a designated level of service. O True O Falsearrow_forward2. Congestion starts at 6am in an expressway. Survey found out that an average of 600vph entered the expressway for the 1* 30minutes, reduced to 250vph and remain constant for the succeeding hours. The booth teller took approximately 10sec to render its service for every vehicle. a. Determine the time of dissipation b. Calculate the total number of vehicles entered for this duration Determine the queue and delay after 45mins from the start of rush hour d. Calculate the delay experienced by the 100th vehicle C.arrow_forward
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