It is full speed for Cameron County's "West Rail Bridge Project."
Leaders are taking a big step forward in their quest for easier travel and trade with Mexico.
Leaders from both the U.S. and Mexico came together in a ceremony to mark the official IBCW international boundary with a demarcation plaque.
The project, which is 10 years in the making, is the first international rail bridge to have been built in 100 years.
The rail line will take trains over the Rio Grande, through Brownsville, and directly over the border fence.
Officially are hoping the plan will alleviate congestion on Brownsville roads where trains tend to slow traffic down.
They also hope the plan will make railroad crossings safer.
Cameron County Judge Carlos Cascos says trade and commerce among the nations will improve.
The plaque marked the transition into the final leg of the project.
The railway project is expected to be completed by the end of 2013.