
One year after Nikol Pashinyan and Ilham Aliyev initialled a peace agreement at the White House, that agreement remains unsigned. What has advanced instead is the commercial vehicle built to run the corridor it was meant to enable. The TRIPP Development Company has been structured as a joint venture with a US partner holding 74 per cent and Armenia 26 per cent over an initial 49-year term, extendable by a further 50 years during which the Armenian share rises to 49. Engineering surveys are underway in southern Armenia. The treaty is not.
Infrastructure normally follows political settlement, because lenders and operators price sovereign risk off signed agreements. Here the order has inverted: a 27-mile multimodal corridor through Syunik has an ownership structure, a term sheet and survey work before the underlying peace treaty has been executed.
That tells you who is underwriting the risk. A 74 per cent US equity position for 49 years is not a passive stake; it is the mechanism by which Washington converts a diplomatic commitment into something with a balance sheet behind it. Secretary of State Marco Rubio reaffirmed the commitment on the 8 August anniversary, and the United States granted $201 million to the Trans-Caspian Enterprise Fund to pull private capital into the wider Middle Corridor. The corridor is being financed as though the treaty exists, on the assumption it eventually will.
Armenia retains full sovereignty over the corridor, including legislative and judicial authority — the point Yerevan needed to sell the arrangement domestically after years of resisting Baku's framing of the route as the Zangezur corridor. The US partner receives exclusive rights to develop and operate the infrastructure and related services. Sovereignty stays; operational control transfers.
The build is more than rail. The plan restores the old line running along the Armenia-Iran border and adds fibre-optic and electricity transmission lines plus a natural-gas pipeline crossing into Nakhchivan. All three countries have endorsed the transmission line. The United States and Armenia published an implementation framework in January.
Azerbaijan has nearly completed the highway and railroad on its own territory that will connect to the Armenian section. That asymmetry matters commercially: Baku has spent and built, and now waits on a counterpart whose section has not broken ground.
The strategic consequence is one Tbilisi has been managing quietly for a year. A completed TRIPP creates a second trans-Caucasus rail route allowing freight to move from Azerbaijan through Armenia into Turkiye and onward to Europe — bypassing Georgia entirely.
Georgia currently captures transit value on effectively all Azerbaijan-Turkiye cargo, and Georgian Middle Corridor container traffic rose 33 per cent in 2025. That position is not immediately threatened; TRIPP has no construction start date and the Kars-Gyumri line remains sealed. But it reframes Tbilisi's recent openness to Armenian participation in the Baku-Tbilisi-Kars railway as the cheaper of two concessions rather than a gesture of goodwill.
The blocking condition is constitutional. Azerbaijan and Turkiye require Armenia to amend its constitution to remove what they read as territorial claims; Pashinyan has committed to a referendum following the June parliamentary elections. Until that vote passes, the treaty stays initialled rather than signed.
Three further problems sit underneath. Border demarcation is years from completion and the entire corridor route runs through a non-demarcated zone. The draft contains no provision on displaced Karabakh Armenians or on Armenians held in Azerbaijani custody — an omission that constrains how much domestic support any Armenian government can build for it. And Iran, whose border the route parallels, opposes TRIPP outright on the grounds that it degrades Tehran's own transit relevance; Armenian and Iranian officials met recently to discuss parallel corridors and streamlined border procedures, which reads as hedging.
Turkiye's position compounds the delay. Foreign Minister Ararat Mirzoyan has been explicit that the Kars-Gyumri railway is TRIPP's western terminus, not an accessory to it. A joint Turkish-Armenian working group on reopening the line met in Kars in April, but Ankara maintains that normalisation follows a signed Armenia-Azerbaijan peace agreement. Without that border, TRIPP terminates into a closed frontier.
Two markers. First, whether the constitutional referendum is scheduled with a firm date rather than referenced as forthcoming — that is the single gate on the treaty. Second, whether TDC announces a construction start or a lead contractor for the Armenian section. Engineering surveys are cheap and reversible; a mobilisation contract is not, and would be the first evidence that the 74 per cent shareholder is prepared to spend ahead of a signature.