Lekki Coastal Interchange
A grade-separated interchange easing one of the busiest junctions on the Lekki corridor.
3.4 km corridor · Lekki, Lagos
The Lekki Coastal Interchange was delivered to relieve a bottleneck handling more than 60,000 vehicles a day. The scope combined 3.4 km of new carriageway, two reinforced concrete bridges, a pedestrian underpass and a complete storm drainage network.
Engineering under live traffic
Keeping the existing road open was the defining constraint. We sequenced bridge beam installation over six night closures, used precast elements to cut on-site time, and maintained two live lanes throughout construction.
Ground conditions included soft coastal deposits, so we adopted ground improvement before pavement works and built an independent testing regime into every pour.
Outcome
The interchange opened three weeks ahead of programme with zero lost-time injuries across 1.9 million work hours.