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Note for Transportation Engineering 1 - TE1 By Hemant Gulati

  • Transportation Engineering 1 - TE1
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Hemant Gulati
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Kurukshetra University, Kurukshetra B.Tech (Civil Engineering) Transportation Engineering – I Unit – II Chapter – I Er. Hemant Gulati Astt. Professor E-Max Group Of Institution Ambala, Haryana

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CONTENTS S. No PARTICULARS PAGE No. 01 Highway Geometric Design 01 1.1 Objectives 01 1.2 Important factors controlling the geometric design of highway. 01 02 Highway Cross Section Elements. 02- 08 2.1 Pavement Surface Characteristics 02 - 03 2.2 Camber or Cross slope 03 – 04 2.3 Width of Carriageway 05 2.4 Formation Width 06 2.5 Right of Way 06 2.6 Kerbs 2.7 Road Margins 07 2.8 Median/separator 08 2.9 Building Line 08 2.10 Control Line 08 3 06 - 07 Highway Sight Distance Consideration 09 - 16 3.1 Stopping Sight Distance 09 - 12 3.2 Overtaking Sight Distance 13 – 15 3.3 Intermediate Sight Distance 15 3.4 Sight Distance at Intersections 3.5 Head Light Sight Distance 15 - 16 16

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Highway Cross Section Elements & Sight Distance Consideration Er. Hemant Gulati Highway Geometric Design It deals with the dimensions and layout of visible features of the highway such as alignment, sight distance and intersection. Objectives: Optimum efficiency  Maximum safety  Minimum (Reasonable) cost Following elements are considered in geometric design of highway:i. Cross section elements ii. Sight distance considerations iii. Horizontal alignment details iv. Vertical alignment details v. Intersection elements Important factors controlling the geometric design of highway i. Design speed ii. Topography • Plain (slope up to 10%) • Rolling (slope 10-25%) • Mountainous (slope 25-60%) • Steep (slope more than 60%) iii. Traffic factors • Vehicular characteristics • Human or Road user characteristics iv. Design hourly volume and capacity v. Environmental and other factor • Rainfall • Temperature • Air pollution • Noise pollution January 1, 2019 1

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Highway Cross Section Elements & Sight Distance Consideration Er. Hemant Gulati Highway Cross Section Elements a. Pavement surface characteristics b. Cross slope or camber c. Width of pavement or carriageway d. Kerbs e. Road margins f. Formation width (Width of roadway) g. Right of way h. Building line i. Control line j. Median / seprator Cross-Section of road and its elements a. Pavement Surface characteristics ▪ Friction ▪ Pavement unevenness January 1, 2019 2

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