Road Project Technical Profile
1. General Overview
- Project Name: National Expressway Expansion
- Total Length: 50 km (31 miles)
- Road Type: Dual Carriageway Highway
- Lane Configuration: 4 lanes (2 in each direction)
- Lane Width: 3.75 meters (12.3 feet) per lane
- Shoulder Width: 2.5 meters (8.2 feet) on both sides
- Design Speed: 120 km/h (75 mph)
- Median Separation: 4.5 meters (15 feet) with barrier protection
- Intended Use: High-speed vehicular traffic (cars, trucks, buses)
2. Pavement & Surface Design
- Surface Material: Asphalt Concrete (Flexible Pavement)
- Base Layer: Crushed stone aggregate (300mm thick)
- Subbase Layer: Granular subbase (200mm thick)
- Drainage System: Longitudinal and cross drains with culverts every 500m
- Markings & Signage: Reflective thermoplastic lane markings and LED-lit traffic signs
3. Load Capacity & Traffic Flow
- Projected Traffic Volume: 40,000 vehicles/day
- Axle Load Capacity: 15 metric tons per axle
- Weigh Stations: Placed at entry and exit points for trucks
- Toll Booths: Electronic toll collection at 4 locations
4. Bridges & Overpasses
- Number of Bridges: 5 (each with a length of 300 meters)
- Overpasses: 10 pedestrian and vehicular flyovers
- Bridge Type: Reinforced Concrete Box Girder with pile foundation
- Navigation Clearance: 5.5 meters (18 feet) for vehicles under bridges
5. Safety & Features
- Guardrails: Steel crash barriers along curves and slopes
- Emergency Lanes: 3.5-meter-wide emergency stopping lane
- Lighting: LED streetlights every 50 meters, solar-powered backup
- Speed Monitoring: CCTV and radar speed enforcement
- Rest Stops: Every 20 km with fuel stations, food courts, and rest areas
6. Environmental & Maintenance Considerations
- Noise Barriers: Installed near residential zones
- Eco-Friendly Drainage: Water collection and filtration for reuse
- Slope Protection: Geo-textile reinforced embankments
- Regular Maintenance: Resurfacing every 5 years, structural inspection every 2 years
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