How a 128 km corridor was dualized - the engineering problem, the method, the technical result and what we learned.
The Lilla Jhelum corridor carried a growing volume of mixed traffic on a narrow two-lane facility. Long-distance freight, local farm traffic and commuter vehicles competed for the same lanes, which created congestion, safety pressure and unreliable journey times across a 128 km length.
The task was an at-grade dualization: widen the existing corridor into a dual carriageway without the cost and disruption of full grade separation, while keeping the road serviceable for local access along the route.
Chainage-wise inventory of the existing road - width, pavement condition, drainage, culverts and the land available for widening.
Dual carriageway geometry with controlled at-grade junctions, design of the pavement section and earthwork balance over the full length.
Itemized estimates from measured quantities - earthwork, sub-base and base, bituminous courses, drainage, culverts and furniture.
Construction planning that staged the works so traffic could keep moving on one carriageway while the other was built.
Staged measurement of work done, quality checks on each layer, and clear reporting so progress and payment stayed aligned.
Documented completion - quality records, measured quantities and drawings of record for the completed dual carriageway.
128 km of at-grade dual carriageway across the Lilla Jhelum corridor, delivered with a full set of design, estimates and construction documentation. The dual carriageway separated opposing flows, restored dependable journey times, and provided a baseline of measured quantities and quality records for the whole length.
Across 128 km, quantities only stay controlled if every chainage is measured and reconciled at each stage. Estimation without a proper measurement system fails on projects of this scale.
Dual carriageways without grade separation remain safe only when junctions, crossing points and access are designed and signed with care. Geometry matters more than speed.
Staging the works by carriageway reduced disruption and kept the route open. Delivery planning is part of the engineering, not an afterthought.
The drawings of record, measured quantities and quality records from this project protect both the client and the contractor when final bills and disputes arise.
Client names, contractual rates, pricing and proprietary drawings are never published. This write-up describes the engineering approach only.
Related: construction supervision and project management, BOQ and cost estimation, civil engineering knowledge - roads and pavements.
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