NIGERIA
Fleet House, 105 Olu Obasanjo Road,
Port Harcourt, Rivers State.
Reconstruction of Old Aba Road in Port Harcourt, Rivers State, Nigeria
Location
NIGERIA
Date
2010
Markets
Roads & Bridges
Project Overview
The Old Aba Road Reconstruction Project in Port Harcourt, Rivers State was a major urban infrastructure initiative executed by Zerock Construction Nigeria Ltd.
The project involved complete rehabilitation and upgrading of the existing road to modern standards, addressing years of deterioration caused by heavy traffic, flooding, and poor drainage. The reconstruction aimed to improve traffic flow, enhance road safety, and boost economic activities along this vital corridor.
The project was commissioned to:
Improve connectivity between Port Harcourt city and Aba commercial hub
Resolve chronic flooding and traffic congestion issues
Enhance safety for daily road users
Stimulate economic growth in the region
Scope of work
Civil Works
Complete road demolition and removal of existing pavement
Excavation and earthworks to establish proper road alignment and gradients
Construction of reinforced concrete drainage systems (side drains, culverts, deep concrete underground and interceptors)
Sub-base and base course preparation using laterite and crushed stone aggregates
Asphalt concrete paving with 50mm wearing course and 60mm binder course
Bridge Construction
Transforming the existing old structurally- deficient bridge to a median landscaped area.
New 2 bridges with 25m single-span including:
Reinforced concrete abutments
Reinforced concrete beams and deck
Concrete parapet walls
Approach roads with transition zones from each side
Road Furniture & Utilities
Installation of road markings and traffic signs
Construction of pedestrian walkways and kerbs
Installation of street lighting systems
Relocation and protection of existing utilities (water lines, Electrical cables, telecom cables)
Traffic system installation
Special Features
Construction of dedicated bus stops
Junction improvements at major intersections
Landscaping and beautification elements
Erosion control measures along vulnerable sections
Landscaping and green belts
Erosion control measures
Challenges
Environmental Factors
High water table and poor soil conditions (1.5m below surface) requiring dewatering and extensive geotechnical solutions
Frequent rainfall causing work stoppages and drainage challenges
Existing underground utilities Over 15 underground services requiring relocation and careful mapping and protection
Poor subsoil conditions (up to 4m soft clay layer) necessitating soil stabilization
Logistical Constraints
Heavy traffic flow necessitating phased construction and traffic management
Limited access to some sections due to dense urban development
Material sourcing difficulties during peak construction periods
Social Factors
Community expectations and complaints about construction disruptions
Security concerns in some neighborhoods along the route
Coordination with multiple stakeholders including utility companies and local businesses
Compensation issues for affected properties
Impact
Improved Transportation Efficiency
Reduction in travel time
Elimination of notorious traffic bottlenecks
Enhanced connectivity to key economic zones
Elimination of major flood points that previously closed road seasonally
Increase in load capacity
Economic Revitalization
Increased property values along the corridor
Revival of commercial activities in previously congested areas
Attraction of new businesses and investments
Enhanced Safety
Reduction in road accidents
Proper pedestrian walkways reducing pedestrian-vehicle conflicts
Improved night time visibility with new street lighting
Environmental Benefits
Effective drainage system eliminating chronic flooding
Reduced vehicle emissions from smoother traffic flow
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NIGERIA
Fleet House, 105 Olu Obasanjo Road,
Port Harcourt, Rivers State.
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