The transport ministry has presented a new proposal that would expand the San Carlos highway from two to four lanes.
The Ministerio de Obras Públicas y Transportes said it wanted to correct problems with the original design of the highway.
The changes are presented to the Contraloría General de la República, which is the budget watchdog.
Among the changes will be a connection of the new highway to the Bernardo Soto highway. The roadway is expected to cut in half the time of traveling from San José to San Carlos, which is the gateway to the northern zone.
The new road is expected to boot tourism to La Fortuna, the town near the Volcán Arenal. The ministry also said that 50 percent of the milk and 60 percent of the pineapple crop travel between the two points.
The ministry is planning to do the work with a $140 million allocated from the Asamblea Legislativa. The entire project, which is about 40 percent completed, has a price tag of $205 million.
The ministry said it was expecting a quick approval to the updates by the Contraloría.