You can find more details on this amazing road work that includes paving and bridge infrastructure in the following packet from the Government of Belize. To date August 5, 2022 there has been major road infrastructure put in including raising the road, installing culverts for proper drainage, pavement has began on the improved side between Sarteneja and Chunox.
Both the ferries have been moved to new locations and bridge work has commenced at the Laguna Seca Crossing and the New River Ferry.
Official Press Release: https://www.nationalassembly.gov.bz/wp-content/uploads/2020/03/Ministry-of-Works-Corozal-to-Sarteneja-Road-Upgrading-Contract-No.-183.pdf
Opening Ceremony: https://www.breakingbelizenews.com/2019/11/15/50-million-corozal-sarteneja-road-project-breaks-ground/
Pavement Milestone: Corozal Daily Article
Laguna Seca Bridge Progress January 2022: Pictures and Article