SC's 40m–75m rule redefines NHAI's NH 66 corridor control

A Sudden Regulatory Shift

The Supreme Court of India’s April 13 interim order is reshaping the commercial geography of National Highway 66 before any new pavement is laid.

In a suo motu case, the court has barred new houses within 40 metres of the highway centre line and commercial construction within 75 metres, directing the Union Ministry of Road Transport and Highways to issue a unified notification.

The National Highways Authority of India becomes the gatekeeper for licence renewals inside the restricted band.

For Kerala’s NH 66 corridor—being rebuilt as a 45-metre, six-lane artery across nine districts from Thiruvananthapuram to Kasaragod—the arithmetic is stark.

The state has acquired 1,079.66 hectares and demolished 27,035 structures to widen a road previously 30 metres wide.

The order adds 35 metres of controlled land on either side, placing roughly 2,500 hectares under regulatory shadow without acquisition.

From Acquisition to Regulation

That is the structural shift.

The old model was acquire-and-compensate; land was notified, paid for, and taken.

The new regime is regulate-and-control: MoRTH and NHAI gain development control over a corridor they have neither acquired nor compensated—capital efficiency for the exchequer, but a discretionary approval for landowners who previously held a right to rebuild.

Early Execution Risks

Execution risk is already visible.

People who rebuilt partially demolished structures report that local self-government institutions are:

- Withholding building numbers
- Refusing to fix property taxes
- Declining to renew business licences

Between the April 13 order and the August 17 hearing, local bodies are front-running compliance without a statutory notification—an informal freeze likely to trigger litigation.

Commercial and Contractor Implications

The contractor-facing implication is subtle but material.

The six-lane works are unaffected; right-of-way is already in hand.

But the corridor’s commercial value—fuel stations, logistics yards, highway amenities underpinning traffic and tolling economics—is now constrained by a 75-metre commercial control line, altering revenue assumptions for operators banking on roadside commercial intensity.

A Regulator in the Making

The real signal is that India’s highway authority is being repositioned from builder-acquirer into corridor regulator.

NHAI’s licence-approval power extends its reach 75 metres on either side at zero acquisition cost.

The August 17 hearing will decide whether the notified land is ever acquired—and whether this is a temporary compliance shock or a permanent re-pricing of land along every national highway.