While recent construction has resulted in a substantial drop in traffic, Loop 410 North prior to 2003 was the most heavily traveled roadway in South Texas, carrying around 200,000 vehicles per day along its northern arc.  Most of the corridor was only six lanes, resulting in significant congestion during most of the day. To improve mobility in the Loop 410 corridor, TxDOT embarked on the largest highway expansion program in San Antonio's history, a seven-year, $483 million program to widen Loop 410 to 10 lanes from Culebra to I-35 North.  In addition, new four-level interchanges at I-10 and US 281 were included in this program as were new interchanges at San Pedro Ave. and Bandera Rd.

Overview

Not including the 1-10 and US 281 interchanges, there were eight projects to widen the Loop between I-35 and Culebra.  All eight have now been completed.

Loop 410 construction status schematic
 

The section between Fredericksburg Rd. and Cherry Ridge was included in the Crossroads Interchange project.  The section between McCullough and Nacogdoches Rd. is included in the Airport "Web" Interchange project.

Status (as of January 2010)

• Culebra to Ingram: Completed in late 2009.
   
• Ingram to Callaghan (Bandera Interchange): Completed in mid 2009.
   
• Callaghan to Fredericksburg Rd: Completed in early 2004.
   
• I-10/Loop 410 interchange: Completed in early 2009.
   
• Cherry Ridge to West Ave: Completed in 1997.
   
• Jackson-Keller to Honeysuckle: Completed in late 2003.
   
• Honeysuckle to Blanco Rd: Completed in mid 2004.
   
• Blanco Rd to McCullough (San Pedro Interchange): Completed in early 2009.
   
• US 281/Loop 410 interchange: Completed in mid 2009.
   
• Nacogdoches to Austin Hwy: Completed in late 2010.

Project history

A Major Investment Study (MIS) of the Loop 410 corridor from I-35 North to Culebra conducted in 1996 for the Metropolitan Planning Organization (MPO) recommended expansion of the freeway to 10 lanes from Austin Hwy. to Ingram.  There initially was some discussion on double-decking the lanes, but that plan was eventually dropped.

TxDOT had a website called "410forSA.org" that had details on the Loop 410 projects, but that site disappeared inexplicably in mid 2004.