Week 1 Challenge

Design Summary Report

NATIONAL HIGHWAY AUTHORITY OF INDIA

(Ministry of Road, Transport & Highways Government of India)

Four laning of Tumakuru-Shivamogga section From km 12.310 to (Design Km 12.300) to Km. 26.850 (Design Km 25.930) from Mallasandra to Mathighatta village of NH-206 in the State of Karnataka.

1. Create a design summary report (DSR) for the following items for any highway you are aware of in your region. Mention the highway name, and location: -

1. Category/Class of the road.

Solution: National Highway Road.

1. Design speed of the road.

Solution: 100 km/hr.

1. Terrain classification.

Solution: Plain.

1. Travel Lane width.

Solution: 3.5m sigle lane

1. Typical min. cross slope.

Solution: 2.5%.

1. Horizontal curve radius without superelevation.

Solution: 600m radius of curve

2. What is the typical roadway project life cycle workflow? List out in points. What is the typical roadway design workflow? Also, list out all the experts needed on a roadway project.

Solution: Design Summary Report

Road way

Name

Location

Length

Limits

Type of work

New construction, Reconstruction, Realignment, Widening, Overlay, Milling.

Class of road

No. of traffic lanes

Lane width

Shoulder width

Median width

Kerb

Bridge/culvert data collection

Stream, rail road, Intersections data

Type of terrain

Geometric Design elements

Design speed

Max Horizontal curve

Max Super elevation

K value

Max/Min Grade

Typical cross section

Side walk width and slope

Clear zone

Vertical clearance for bridges

3. What are the important geometrical parameters of a horizontal alignment and vertical profile? When is a vertical curve needed? List the formula with a diagram for vertical curve. List all types of vertical curves with the diagrams.

Solution: Horizontal curve: 1) Radius of flatter curve less than 50% of the radius of sharper curve. 2) Sharp curve should not follow tangent on a series of flat curves. 3) Avoid sharp curve in high, long fill areas. 4) intersecting tangents at reverse curve on high speed facilities. 5) Broken back curve should not be considered. 6) Design speed should be consistent with design features and topography.

Vertical Curve: 1) vertical curve provide gradual changes between tangents of different grades. 2) 5% high speed. 3) 1% in normal road. 4) effects on rate length of grade. 5) critical length of grade.

There are two types of vertical curves:

Crest curves

Sag Curves

4. When is superelevation necessary? Show diagrammatical presentation of super concept.

Solution: Superelevation is the transverse slope along the width of the road provided by rising the outer edge of the road with respect to the inner edge, throughout the length of the horizontal curve. It is provided to facilitate the safe passage of the vehicle in a horizontal curve

5. List out the typical set of submission needed for a roadway project.

Solution: Cover sheet, Index sheet, Project Layout, Typical sections, Plan and Profiles, Plan only, Design Cross sections, Traffic control plan, Quantities, Summary of Quantities.