Week 1 Challenge

1. Design Summary Report
   1. NH 4 Hubli Dharwad bypass
   2. 80 KM
   3. Plain Terrain
   4. 12.0
   5. 2% (1 in 50 –Heavy rainfall Area)
   6. 1400 Mt

2. Typical Roadway Project lifecycle workflow

1. Project Need -Form Team -Conceptual Design -Environment Input -Local Agency input	2. Project Initiation -Project purpose -Alternative analysis -Planning Estimates -Preliminary Enviro. Eval
3. Project Clearance - Engineering Studies - Environmental Doc. - Geotechnical Docs. -Public hearings - Project Approval Doc.	4. PS& E - Plans, Specification - Estimates - Traffic Plans - Work Zone Manage Plan
5. Construction -Inspection -Modification	6. Operation -Monitoring

Experts in Roadway Project

1. Highway Engineer
2. Geotechnical Expert
3. Geometric Design Expert
4. Surveyor
5. Quantity Surveyor
6. Procurement
7. Material Engineer
8. Administrator
9. Tender Expert
10. Technical Manager
11. Software Expert
12. Traffic Analyzer

3. Geometrical Parameters of Horizontal Alignment

• Sight Distance
• Radius of horizontal curve
• Length of horizontal transition curve
• Rate of super elevation
• Extra widening of pavement at horizontal curve

Geometrical Parameters of Vertical Alignment

• Vehicle Speed
• Acceleration and deceleration
• Stopping distance
• Sight distance
• Vehicle operation cost
• Comfort travelling at high speeds

Vertical Curve: The Natural Ground or the Topography may be level at some Paces, but may have slopes of varying magnitude at other locations. The changes in gradient should be smoothened out by vertical curves.

4. Superelevation is the banking of highway horizontal curves to assist the driver by counteracting the lateral acceleration produced by tracking the curve. Proper superelevation allows a vehicle to safely turn at high speeds and will make riders comfortable. Centrifugal force is the outward pull on a vehicle traversing a horizontal curve. As a vehicle traverses a horizontal curve, centrifugal force is counterbalanced by the vehicle weight component due to roadway superelevation and by the side friction between tires and surfacing. Excessive centrifugal force may cause considerable lateral movement of the turning vehicle and it may become very hard to stay inside the driving lane. Superelevation and side friction are the two factors that help stabilize a turning vehicle. Inadequate superelevation can cause vehicles to skid as they travel through a curve, resulting in a runoff road crash.

5. Typical set of submission needed for a roadway project

• Cover Sheet ( Key map, Scope, Client name, Traffic ADT, Project Speed, Approving Authority)
• Index Sheet
• Project Layout
• Typical Sections
• Plan & Profile
• Plan only
• Design Cross Section
• Traffic Control Plans
• Quantities
• Summary of Quantities