Widening and reconstruction of a 21 km highway section carrying continuous freight traffic, including cross-drainage replacement and a reconstructed urban section through two market towns.
The corridor carries continuous freight; full closure was not permitted at any point.
Two market towns along the alignment have shopfronts directly abutting the carriageway.
The original drainage was undersized, causing recurring pavement failure at 34 locations.
Construction is staged in 800 m sections with half-width working and signed diversions, maintaining one lane in each direction at all times.
Urban sections are built in short lengths with steel plate bridging to preserve shopfront access during working hours.
Cross-drainage capacity was recalculated against updated rainfall data, and structures upsized before pavement reconstruction.
Night working was introduced for asphalt laying in the urban sections, agreed with the municipality and notified to residents.
Corridor length
21 km
Drainage structures
34
Replaced or upsized
Traffic
Maintained
No full closure at any stage
Status
Ongoing
A 180-metre, four-span river crossing replacing a seasonal causeway that closed the corridor for up to eleven weeks each monsoon. Substructure was built inside a single low-flow window using staged cofferdams.
Reinstatement of 3.2 km of hill road after monsoon slope failure, combining emergency access restoration with permanent stabilisation and drainage.
Reconstruction of 6.5 km of city streets with covered drainage, footpaths and utility coordination, sequenced so each street was opened only once.
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