Examine the trade-offs between BOT, HAM and EPC modes of highway development in India.

Highway delivery in India is essentially a question of who bears construction, financing and traffic risk. EPC, BOT (Toll) and HAM allocate these three risks differently, and each gain on one count is paid for on another.

EPC — speed and control, at full public cost

• Government funds 100% of the project and owns the asset; the private party only executes construction [1].
• Trade-off: fastest to award and free of concession disputes, but the entire capital outgo, traffic risk and O&M burden sits on the exchequer — no leverage of private capital.
• Suited to low-traffic, strategic or border stretches where tolling cannot recover cost.

BOT (Toll) — private capital, but concentrated risk

• Concessionaire finances, builds, tolls and transfers; near-zero upfront budgetary outgo.
• Trade-off: viable only on high-traffic corridors. Over-leveraged developers and stalled projects made lenders averse, collapsing BOT awards and forcing the shift to HAM/EPC [1].
• Revival is visible: CCEA's approval of the Baihata Chariali–Tezpur corridor on NH-15, Assam (135.87 km, Rs 8,970.20 crore) on BOT (Toll) under the NH(O) head [2].

HAM — the calibrated middle path

• Government pays 40% of cost during construction in instalments; the balance 60% as annuity after completion, with interest [1][3].
• Trade-off: it lowers the developer's financing burden and removes traffic risk, reviving private participation — but converts present cost into a deferred, contingent fiscal liability, and still depends on timely land acquisition. The NH-6 Shillong–Panchgram (Silchar) corridor, 166.80 km, Rs 22,864 crore, uses HAM [4].

No mode is universally superior; the choice must follow corridor traffic density, fiscal headroom and risk appetite. A pragmatic path is mode-selection based on credible traffic forecasts, faster dispute resolution to restore lender confidence in BOT, and capital recycling through TOT and InvIT monetisation [5]. Aligned with PM GatiShakti, such calibrated risk-sharing can deliver infrastructure without straining either the exchequer or private balance sheets.