Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Question
Chapter 2, Problem 19P
To determine
The four principal modes for moving freight and the mode that carries the largest share of ton-miles and the one that carries the lowest.
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Chapter 2 Solutions
Traffic and Highway Engineering
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- Why would companies use ocean transportation versus air freight service to move international freight?arrow_forward(a) Explain and sketches the types of incidents for the activities of loading and unloadingarrow_forwardGiven the following Mass-Haul Diagram: Mass Diagram 5000 4000 3,500 3000 2,100 6.0 2,100 7.0 2000 8.0 1,500 1,500 g t--------- 6.0 8.0 O 1000 1,100 - 7.1 750 5.0 TO -1000 3-2000 -3000 -3,000 ´ -4000 -5000 5 10 15 20 25 Stations Limit of free haul = 600 ft Price of excavation = $3.50 Price of borrow = $3.75 Overhaul = $1.50 What is the total excavation cost to the nearest dollar? $30,000 O $28,000 $25,375 $20,250 O None of the above Net Cumulative Yardagearrow_forward
- What factors have contributed to the decline in the volume of higher-valuefreight by the railroads? What changes, if any, could the railroads make to attract back more higher-value freight from motor carriers?arrow_forward8-6. Determine the haul equation constants a and b for the following data. Average haul speed, mi/h Round-trip distance, mi/trip "Arip 4%-9 10 0.9 20 2.9 25 4.0 29 5.5 30 6.0 35 8.0 39 10.0 40 11.0 45 15.5 50 28.0arrow_forwardWith reference to mass haul diagram, explain what is meant by the following terms:-Free haul distance-Overhaul distance-Haul-Waste-Borrowarrow_forward
- /Abridge has been in use for twelve years at the following conditions: 1- during the first two years it has carried five milions cars and one hundered thousend lorries 2- during the followed four years it has carried fifteen milions cars and two hundered thousend lorries 3- during the followed two years it has carried ten mmilios of cars only 4- during the last four years it has carried one hundered thousend lorries only The amplitude stress of cars is 108 cycles and 106 cycles for lorries Calculate the fatique life of bridgearrow_forward9. A rigging job calls for lifting a structure that weighs 150 tons. Two cranes are available, one with a rated capacity of 85 tons and the other with a rated capacity of 120 tons. The total weight of the rigging required to make the lift is 15 tons, of which 10 tons is to be carried by the larger crane and 5 tons is to be carried by the smaller crane. If the cranes are to be loaded in proportion to their net capacities, what should be the approximate net load on the 120-ton crane? A. 85 tons B. 44 tons C. 56 tons D. 63 tonsarrow_forwardA large manufacturer uses two factors to decide whether to use truck or rail for movement of itsproducts to market: cost and total travel time. The manufacturer uses a utility formula that rateseach mode. The formula is U = 5C + 10T, where C is cost ($/ton) and T is time (hours). For agiven shipment of goods, a trucking firm can deliver in 16 hours and charges $25/ton, whereas arailroad charges $17/ton and can deliver in 25 hours. a. Which mode should the shipper select? b. What other factors should the shipper take into account in making a decision?arrow_forward
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