Even though this section of highway 54 is actually in Jalisco it's the gateway to Colima. They have been working on widening the section over the canyons for about a year but now it looks like they may be adding another lane or two. With so much hillside to move they have had to close one lane in a few places for the last month.
Stopping traffic for extended periods for months requires vendors and sure enough the Tuba vendors from Colima are stationed at each stopping point. Tuba is a palm drink made from the sap of the tree. It originated in the Philippines and was imported during the Spanish Gallon trade