The project consists of the design, construction, operation, conservation, maintenance and exploitation of the "Atlacomulco-Polotitlán" highway type A-4, with a crown width of 22 meters, it will have 4 traffic lanes of 3.5 meters wide, two in each direction, 3.0 meters wide exterior boundaries, 1.0 meters internal boundaries and separating barrier of senses.

It includes the construction of 4 uneven junctions and incorporates 1 railroad crossing, 11 bridges and 3 viaducts, beginning the line on the Toluca – Polotitlán federal highway starting in the town of San Francisco and ending in Polotitlán with a junction on the Mexico - Querétaro Highway, with a total length of 82.80 kilometers, with an impact on the municipalities of Atlacomulco, Acambay, Aculco, Ixtlahuaca, in the State of Mexico.

FIRST AMENDMENT AGREEMENT (May 24, 2023). The contract term is extended to 53 years from the date of signing.