Preparation of Detailed Project Report (DPR) for Road Projects
Preparation of DPR involves following components
1.0 Understanding Scope of Work
2.0 Traffic Surveys
3.0 Engineering Investigations
4.0 Detailed Designs
5.0 Tender and Construction Drawings
6.0 Project Costing
7.0 Economic Analysis
8.0 Formulation of Construction Packages
9.0 Compiling Project Report
Scope of Services
UNDER STANDINGTHE TOR
SURVEYS AND INVESTIGATIONS
1. Reconnaissance Survey
2. Traffic Surveys
3. Topographic Surveys
4. Engineering Surveys
5. Soil & Material Investigations
6. Social And Environmental Surveys
Axle Load Surveys
Engineering Surveys And Investigation
1. Road Inventory Survey
2. Inventory And Condition Assessment Of Existing Cross Drainage Structures
3. Preparation Of Strip Plan
4. Assess Adequacy Of Drainage
5. Pavement Condition Survey
6. Pavement Roughness Survey
7. Pavement Composition Survey
8. Benkelman Beam Deflection (Bbd) Survey
Road Inventory Survey
A) The Road Inventory survey consists of recording the physical features along and across the project road in a prescribed format.
Inventory and Condition Assessment of Existing Cross Drainage Structures
Assess Adequacy of Drainage
Pavement Condition Survey
Pavement Roughness Survey
Pavement Composition Survey
To know the pavement composition and to collect the soil samples for testing, trial pits of size 1m x 1m shall be made at the interface of pavement with shouldersaccording to the following procedure:
Benkelman Beam Deflection (BBD) Survey
Subgrade Soil Samples
4.0 DETAILED ENGINEERING DESIGN
4.1 Engineering Design
4.1.1 Highway Geometric Design
4.1.2 Design Of Built-up Areas
4.1.3 Design Of Pavement And Shoulders
4.1.4 Overlay Design
4.1.5 Design Of Service Road And Bypass
4.1.6 Design Of Embankments
4.1.7 Design Of Roadside Drainage
4.1.8 Detailed Design Of Bridges/Structures
4.1.9 Design Of Arboricultural And Landscaping
4.1.10 Design Of Intersection And Interchange
4.1.11 Design Of Traffic Safety Features, Road Furniture And Road Markings
4.1.13 Weighing Station, Parking Areas And Rest Areas
4.1.14 Design Of Wayside Amenities
4.1.15 Design Of Communication System
4.1.16 Design Of Bus-Bays And Lay-By
4.1.17 Design Of Miscellaneous Items
5.1 Project Costing
5.1.1 Finalisation Of Unit Rates
5.1.2 Preliminary Estimate Of Quantities
5.1.3 Preliminary Costing
5.2 Economic Analysis
5.2.1 Construction/Improvement Cost
5.2.2 Vehicle Operating Costs And Time Costs
5.2.3 Accident Costs
5.2.4 Social And Environmental Costs
5.2.5 Estimation Of Project Benefits
5.2.6 Economic Analysis By Section
5.2.7 Finalisation Of Improvement Option
5.3 Financial Analysis
5.3.1 Determination Of Toll Rates
5.3.2 Compilation Of Project Costs
5.3.3 Identification Of Preliminary Project Revenue Stream
5.3.4 Financial Analysis
5.4 Formulation Of Construction Packages
5.5Submission Of Project Report Highway Geometric Design
Horizontal Alignment: The proposed centerline shall be finalised using asophisticated highway design software, All the curves having poor geometry shall be improved to the acceptable design standards
Vertical Profile: The existing longitudinal section of the project road shall be obtained from modeling the ground data. The finished profile shall depend on the thickness of the pavement layer determined from pavement design provision for necessary profile corrective and camber corrective course.
– Avoid cutting/scraping of existing pavement at strengthening only sections
– Compatibility of design speed to horizontal geometry of the section
– Provide adequate vertical curve at the grade change from stopping sight distance criterion.
Cross Section: The proposed cross sections are broadly composed of carriage way, medians, raised footpath, hard shoulders, earth shoulder and drainage provisions. While running cross-sections care shall be taken in applying appropriate super elevation parameters, strengthening & widening, and improvement options based on rural, built-up etc.
Design of Built-up Areas
This activity shall focus on design of urban areas in the form of parking lane, service road, sidewalk and roadside drainage underneath the sidewalk etc. All these details shall be clearly shown in the horizontal plan and also typical cross sections shall be prepared.
Design of Pavement and Shoulders
a) The performance of pavement in terms of functional performance, structural performance, structural capacity, and safety contribute to the need for an overlay.
b) Functional performance refers to the ability of the pavement surface to provide a reasonable riding quality measured in terms of roughness.
c) Structural performance is the ability to retain the integrity of the pavement by preventing distress in the form of cracks, ruts, potholes, etc.
d) Structural capacity is the pavement's ability to accommodate the axle load on the pavement. Safety aspect refers mainly the skid resistance and hydroplaning potential.
Design of Service Road and Bypass
• This activity shall focus on design of service road and bypass in terms of number of lanes and pavement composition.
• The local traffic component shall be segregated and would determine the number of lanes to be provided in the service road. Depending on this traffic loading and soil investigation already carried out, the pavement composition shall be decided.
Design of Embankments
• The embankments would be designed after detailed analysis and as per the relevant standards and latest software available. General design parameters shall follow IRCguidelines.
Design of Roadside Drainage
Detailed Design of Bridges/Structures
Design of Arboricultural and Landscaping
Appropriate plans shall be developed for planting of trees, horticulture and floriculture on the unused land of the RoW in order to beautify the project corridor view and improve the overall aesthetics.
Design of Intersection and Interchange
Design of Toll Plaza
Design of Traffic Safety features, Road Furniture and Road Markings
Design of traffic signs and road markings, to effectively guide and control the traffic, shall be carried out based on current national and international practices.
Weighing Station, Parking Areas and Rest Areas
Sites for Weighing stations, parking areas and rest areas shall be selected based on the data collected and as per the discussions with the MoRT&H.
Design of Wayside Amenities
Design of the Wayside Amenities carried out in accordance with the comments and suggestions of client and suitable layouts shall be prepared accommodating petrol pump, first-aid medical facilities, restaurant, vehicle parking, toilets, telephone kiosks, etc.
Design of Communication System
An emergency telephone communication system to be used even by a person in emergent condition with little effort shall be designed. This would be a public access telephone system dedicated to control center, which shall coordinate services like fire, ambulance, police and retrieval of breakdown vehicles, besides emergency highway maintenance operations.
Design of Bus-bays and Lay-by
Review of design of bus-bays, in accordance with comments of clients, as per IRC and M/ORT&H guidelines and drawings shall be made.
Design of Miscellaneous Items
Designs for guardrails, street lighting and other necessary roadside appurtenance shall be carried out based on IRC and other current international practices.
Traffic Management Schemes during Implementation
Traffic management during construction is an integral part of execution of highway projects. An efficient scheme or traffic management shall be developed based onMoRT&H and IRC guidelines, which would include traffic diversion plans during construction and maintenance and other measures for traffic control and safety.
Preliminary Estimate of Quantities
Estimation of Project Benefits
Formulation of Construction Packages
* * * * * * * *