Discuss the basic design differences between a highway pavement and a railroad track bed
Discuss the basic design differences between a highway pavement and a railroad track bed
Homework Answers
Layers in highway pavement are (from bottom to top) Sub-soil,Subgrade, Sub-base, base and surface course.
Sub-Base course is made of granular materials, which acts as drainage purpose in highway pavement.
Layers in railroad track bed are (from bottom to top) Sub-soil, Subgrade, Formation, Ballast and sub balast, sleepers and rails.
Ballast is made of mainly coarse aggregates, which acts as drainage purpose in railway track bed.
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Discuss the basic design differences between a highway pavement
and a railroad track bed
What are the basic phases of Highway Design Process? The basic phases of design process are...
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A highway has the following pavement design traffic: Daily Count. 400 (single axle) 150 (single axle)...
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Determine the sight distance leg along the railroad tracks in ft. A two lane road crosses...
Determine the sight distance leg along the railroad tracks in
ft.
A two lane road crosses an at grade railroad track at 90°. If the design speed of the two lane road is 50 mi/h and the velocity of the train when crossing the highway is 90 mi/h, determine the sight distance leg (in ft) along the railroad tracks to permit a vehicle traveling at the design speed to safely cross the tracks when a train is observed at a...
What are the main differences between the wheels of a railway and a highway vehicle
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What are the main differences between the wheels of a railway and a highway vehicle?
What are the main differences between the wheels of a railway and a highway vehicle?
Q2:What are the main differences between the wheels of a railway and a highway vehicle (15...
Q2:What are the main differences between the wheels of a railway and a highway vehicle (15 pts) ?
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A highway has the following pavement design traffic: Daily Count. 400 (single axle) 150 (single axle) 100 (single axle) 100(tandem axle) 30 (single axle) 100 (triple (axle) Axle Load 10,0000 lb (44.5 kN) 18,000 lb (80.1 kN) 23,000 lb (102.3 kN) 32,000 lb (142.3 kN) 32,000 lb (142.3 kN) 40,000 lb (177.9 KN) A flexible pavement is designed to have 4 in. (10.16 cm)of sand-mix asphalt wearing surface, 6 in. (15.24 cm)of soil-cement base, and 7 in. (17.78 cm) of...
Determine the sight distance leg along the railroad tracks in
ft.
A two lane road crosses an at grade railroad track at 90°. If the design speed of the two lane road is 50 mi/h and the velocity of the train when crossing the highway is 90 mi/h, determine the sight distance leg (in ft) along the railroad tracks to permit a vehicle traveling at the design speed to safely cross the tracks when a train is observed at a...
Q2:What are the main differences between the wheels of a railway and a highway vehicle (15 pts) ?
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