Pick up the correct statement from the following: (A) Seasonal cycle of traffic volume during April and November, is usually near the annual average (B) Mid-winter seasonal cycle of traffic is least (C) Mid-summer seasonal cycle of traffic is highest (D) All the above Selection of the routes, of highways depends upon (A) Feasibility of attaining ruling gradient (B) Avoidance of cutting hard rocks (C) Minimum number of bridges (D) All the above Answer: Option D Maximum number of vehicles that can pass a given point on a lane during one hour without creating unreasonable delay, is known as (A) Traffic density of lane (B) Basic capacity of lane (C) Probable capacity of lane

Pick up the correct statement from the following: (A) Seasonal cycle of traffic volume during April and November, is usually near the annual average (B) Mid-winter seasonal cycle of traffic is least (C) Mid-summer seasonal cycle of traffic is highest (D) All the above Selection of the routes, of highways depends upon (A) Feasibility of attaining ruling gradient (B) Avoidance of cutting hard rocks (C) Minimum number of bridges (D) All the above Answer: Option D Maximum number of vehicles that can pass a given point on a lane during one hour without creating unreasonable delay, is known as (A) Traffic density of lane (B) Basic capacity of lane (C) Probable capacity of lane

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter9: Capacity And Level Of Service For Highway Segments

Section: Chapter Questions

Problem 8P

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Q2 / Find the number of lane for the design roadway given the following traffic data: ADT = 7651 vehicles/hour in both direction, - 2% grade , K = 12% , D= 55% , Truck 30%, Busses = 10% , Normal growth for design period = 30% , Generated growth = 20%, Development traffic = 250% , Track = 2 PCU , Busses = 3 PCU and Ideal Сараcity = 1300 PCU / hour / lane.
4. Find the level of service of the following road: (35 points) • 6-lane freeway, terrain: rolling, lanes: 11 ft, right shoulder: 5 ft, 3 ramps in 2 miles peak hour traffic volume in each direction: 4000 veh/h, PHF: 0.95, % trucks: 10% Solution 5 fHV= 6 Vp1684.2 pc/h/In FFS = 68.6 mph c=2385.7 pc/h/In S = 66.5 mph D = 25.3 pc/mi/In LOS C
HW3: LOS of Basic Freeway Given: » Four-lane freeway (2 in each direction) » Lane width =11 ft Right-side lateral clearance =2 ft vV Commuter traffic (regular users) Peak-hour, vV Peak-direction demand volume = 2,000 veh/h 5% trucks, 0% RVs PHF = 0.92 TRD = 4 ramps/mile Rolling terrain v v
Problem 1: A new freeway is being designed through a rural area. The directional design hour volume will be composed of the following 15-min flows: 650, 794, 656, 600 vehicles. The number of trucks and buses in the traffic stream are 250 and 155 respectively – with 0 recreational buses. In average, every 2 miles it will have an exiting/entering ram (or every 1.25 kilometers). This freeway section will have level terrain characteristics. Question: If the objective is to provide level of service C, how many lanes must be provided?
An existing Class I two-lane highway is to be analyzed to determine the level of servicein each direction, given the following information:Traffic data:PHV = 600 veh/h60% in the peak direction8% trucks2% recreational vehiclesPHF = 0.86No passing zones: 40%Geometric data:Rolling terrainBFFS = 55 mi/h (88 km/h)Lane width = 11 ft (3.3 m)Shoulder width = 2 ft (0.6 m)8 access points per mile (5 access points per km)
17 An existing urban freeway with 4 lanes in each direction has the following characteristics: Traffic data: Peak hour volume (in the peak direction): 7070 veh/h Trucks: 10% of peak hour volume PHF _ 0.94 Geometric data: Lane width: 11 ft Shoulder width: 6 ft Interchange spacing (average): 1.4 mile Terrain: rolling Determine the LOS in the peak hour. Clearly state assumptions used for any values not given. Show the demand flow rate, mean speed, and density for the given conditions.
Civil Engineering A four-lane rural freeway segment has a 510 m grade length of 2% upgrade followed by a 630 m grade length of 3%. The freeway has 3.4-m lane, 1.5m left-shoulder lateral clearances and interchanges spaced at every 25 km. During the peak hour, there are 6% trucks, 2% buses, 2% recreational vehicles and the rest are passenger cars. Driver population adjustment is determined to be 0.90, peak hour factor is 0.90 and the BFFS is 110 km/h. At present, the freeway operates at capacity during the peak hour in the direction in question. If an additional 3.4 m lane is introduced, and all other factors stay the same, what will be the new level of service?
A four-lane rural freeway segment has a 510 m grade length of 2% upgrade followed by a 630 m grade length of 3%. The freeway has 3.4-m lane, 1.5m left-shoulder lateral clearances and interchanges spaced at every 25 km. During the peak hour, there are 6% trucks, 2% buses, 2% recreational vehicles and the rest are passenger cars. Driver population adjustment is determined to be 0.90, peak hour factor is 0.90 and the BFFS is 110 km/h. At present, the freeway operates at capacity during the peak hour in the direction in question. If an additional 3.4 m lane is introduced, and all other factors stay the same, what will be the new level of service?
Vertical and Horizontal Alignment 1. A new interstate is being built with a design LOS of 'C'. Given the road is being designed with wide shoulders on level terrain, a design hourly volume of 4000 vehicles in each direction, a peak hour factor of 0.95, a free flow speed of 75 mph, and an expected 25% trucks. How many lanes should the interstate have in each direction? а. 1 b. 2 С. 3 d. e. 5
3. Determine the LOS of the peak direction of this information data: {CLO4, PLO4, C4} v Class 1 two-lane highway V 1,200 veh/h (analysis direction volume) v 400 veh/h (opposing direction volume) v 14% trucks and busses V 4% RVs v 0.95 PHF V 100 km/hr base FFS V rolling terrain v 3.3 m lane width v 1.2 m shoulder width v 10 km roadway length v 50% no passing zones v 12 access points/km
A six-lane freeway (three lanes in each direction in mountainous terrain has 10-ft lanes and obstructions 1ft from the right edge. There are five ramps within three miles upstream of the segment midpoint and four ramps within three miles downstream of the segment midpoint. The traffic stream consists of mostly commuter with a peak hour factor of 0.84, peak-hour volume of 2500 vehicles, and 4% recreational vehicles. What is the level of service?
You are designing a freeway as a passenger-car only facility, and with ideal roadway characteristics. It is estimated that the freeway will have a traffic demand of 75,000 vehicles per day, a free-flow speed of 70 mi/h, a traffic stream of primarily commuters, a peak-hour factor of 0.88, and a directional distribution of 0.65. Determine the number of lanes (both directions) required to provide at least LOS C using the 40th highest annual hourly volume (K = 0.116). A 6 B) 4 c) 10 D) 8