Representatives of the U.S. engineering and consulting company AECOM were in Armenia last week to assess the proposed TRIPP site, the U.S. Embassy in Armenia said.

"The AECOM team and partners from the Government of Armenia surveyed the TRIPP site to support the planning of a railway and other infrastructure that will promote economic growth, connectivity and regional integration," the embassy said in a statement.

In Washington, Armenian Prime Minister Nikol Pashinyan, Azerbaijani President Ilham Aliyev and U.S. President Donald Trump formally reached an agreement to launch the Trump Route.

"The route will allow Azerbaijan to reach Nakhchivan while fully respecting Armenia's sovereignty. Armenia is also establishing an exclusive partnership with the United States to develop this corridor. The agreement may be extended for up to 99 years, with a commitment to renew it for another 99 years afterward. We expect major infrastructure development, and American companies are eager to enter these countries and invest substantial sums, bringing economic benefits to all three of our nations," Trump said.

On September 11, Nikol Pashinyan said that Armenia had not leased land to the U.S. side for 99 years but had instead granted development rights.