The first phase of a road between Pearl Lagoon and El Rama opened on Thursday.
The country's transport ministry highlighted that it has managed to resolve bottlenecks in seven projects in the 4G highways program so far.
Infrastructure for the Pan American Games is set to get new support with six months to go as the government allocated additional funding.
The loan is the first of its kind in 20 years that the bank has provided for Guatemala's road infrastructure sector.
The prosecutor alleges that the tender process favors mining company Vale over other potential competitors.