Ole Sereni to Athi River Interchange Upgrade
Client
Kenya National Highways Authority (KeNHA)
Duration
18 months
Project Value
KES 40.2 Million
Project Overview
A critical infrastructure upgrade project focused on enhancing the Thika Superhighway interchange system. This major undertaking addresses traffic congestion, improves road safety, and increases capacity on one of Kenya's most important transport corridors connecting Nairobi to the central region. The project includes construction of flyovers, service roads, pedestrian walkways, modern drainage systems, and intelligent traffic management infrastructure.
Project Scope
- Construction of 3 multi-level flyover bridges, 6.2 km service roads, 8 pedestrian crossings
- Modern drainage, LED lighting, and ITMS installation
- Environmental and safety compliance documentation
- Features/Functionalities:
- Grade-separated traffic, pedestrian safety, BRT integration
- Timeline & Milestones:
- Construction: 18 months (2024-2025)
- Key milestones: Traffic diversion setup, bridge completion, ITMS commissioning
- Budget/Resources:
- Value: KES 40.2 Million
- Constraints/Assumptions:
- Weather and traffic management may affect schedule
- Coordination with existing utilities required
- Out-of-scope:
- Maintenance of completed infrastructure
- Expansion beyond defined corridor
Key Features
- 3 multi-level flyover bridges
- 6.2 kilometers of service roads
- Pedestrian overpasses and underpasses
- Modern LED street lighting system
- Intelligent Traffic Management System (ITMS)
- Advanced drainage and stormwater management
- Landscaping and environmental beautification
- Bus rapid transit (BRT) integration provisions
- Emergency vehicle access lanes
Project Team
- P
Project Manager
- H
Highway Design Engineer
- S
Structural Engineer
- T
Traffic Management Specialist
- G
Geotechnical Engineer
- E
Environmental Compliance Officer
Challenges
- 1.Managing traffic flow during construction on a high-volume highway
- 2.Complex engineering for multi-level interchange structures
- 3.Coordination with existing utilities and infrastructure
- 4.Minimizing disruption to businesses and residents along the corridor
- 5.Weather-dependent construction activities during rainy seasons
Solutions
- Phased construction approach with temporary traffic diversions
- Advanced structural engineering for elevated roadway systems
- Comprehensive utility relocation and protection measures
- Night-time construction for critical sections to reduce daytime disruption
- Weather monitoring systems and accelerated construction techniques
Project Outcomes
Reduced traffic congestion by 40% at peak hours
Improved road safety with grade-separated pedestrian crossings
Enhanced connectivity between major commercial areas
Modern intelligent traffic management systems
Increased highway capacity by 30%
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