JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives:

• 1. Students will develop a good command of the concepts involved in geometric design of intersections, horizontal & vertical alignment of roads & pedestrian facilities.
• 2. Describe the urban street hierarchy and functional classification system.
• 3. Identify and define the elements of a roadway cross-section. Discuss concepts related to the roadway design speed.
• 4. Discuss alignment and grade elements including sight distance; horizontal and vertical curves; terrain and acceptance grades for urban local and collector streets.
• 5. Define the functional area of an intersection. Identify key design elements for intersections.
• 6. Identify pedestrian street crossing issues.

Course Outcomes

At the end of the course, the student will be able to:

• 1. Design the longitudinal and cross-sectional elements of a highway.
• 2. Design the horizontal and vertical alignment of roads.
• 3. Design the intersections, interchanges, and parking facilities.
• 4. Design the facilities for bicyclists and pedestrians.

UNIT - I

Functional Classification of Highway System; Design Controls – Topography, Driver characteristics, Vehicle Characteristics, Traffic, Capacity and Level of Service, Design Speed. Objectives of Geometric Design, Cross Section Elements: Design specifications; Pavement Surface characteristics – Skid Resistance, Road Roughness; Camber, Objectives, design standards. Specifications for hill roads.

UNIT - II

Horizontal Alignment of Roads: Sight Distances – Stopping Sight Distance, Overtaking Sight Distance and Intermediate Sight Distance; Objectives of horizontal curves; Super elevation; Extra- widening on Curves; Transition Curves – Objectives and Design. Transition Curve setting methods

UNIT - III

Vertical Alignment of Roads: Gradients – Types of Gradients, Design Standards; Vertical Curves – Summit Curves, Valley Curves and Design criteria for Vertical Curves; Importance of Sight Distances for Horizontal and Vertical Curves; Combination of Vertical and Horizontal Curves – Grade Compensation

UNIT - IV

Geometric Design of Intersections: Types of Intersections; Design Principles for Intersections; Design of At-grade Intersections – Channelization, Objectives; Traffic Islands and Design standards; Rotary Intersection – Concept, Advantages and Disadvantages; Grade separated Interchanges – Types, warrants and Design standards.

UNIT - V

Miscellaneous Elements: Requirements of Pedestrians; Pedestrian facilities on Urban Roads; Cycle Tracks – Guidelines and Design standards; Bus bays –Types and Guide lines; Design of On-street and Off-street Parking facilities – Guidelines for lay out Design, Traffic Signs and Markings.

R19 M.TECH HIGHWAY ENGG.

REFERENCE BOOKS:

• 1. Principles and Practice of Highway Engineering, L.R. Kadiyali and N.B.Lal, Khanna, 2007.
• 2. Traffic Engineering and Transportation Planning, L.R.Kadiyali, Khanna Publications, 2007.
• 3. Highway Engineering, C.E.G.Justo and S.K.Khanna, Nem Chand and Brothers.
• 4. IRC Codes for Signs, Markings and Mixed Traffic Control in Urban Areas. R19 M.TECH HIGHWAY ENGG. M.TECH.- I YEAR- II SEMESTER HIGHWAY ENGINEERING