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San Antonio Area Freeway System
State Spur 371
(General Hudnell Drive)
This page last updated February 6, 2024

SP 371 highlight map
SP 371 highlight map

This page covers State Spur 371 from US 90 to Port San Antonio (the former Kelly Air Force Base).

Length: 1.7 miles

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On this page:

Overview Roadway
details		 Lanes Access
roads
       
Exits Speed
limits		 Special features
and notes		 Traffic
       
Media
gallery		 Construction
projects		 Future
plans		 History
       

Overview

This short freeway provides access from US 90 to Port San Antonio, an inland port and industrial park on the site of the former Kelly Air Force base. The route runs mostly along a railroad with residential areas fronting the opposite side.

Roadway details

LANES
SP 371 lanes map
  • 4 lanes between US 90 and Frio City Rd.
  • 6 lanes between Frio City Rd. and Billy Mitchell Blvd.
 SP 371 lanes map
   
ACCESS ROADS
  • There are no access roads along this freeway.
 
EXITS

SOUTHBOUND:

  • Quintana Rd./East Kelly Railport
  • Freeway ends at Billy Mitchell Blvd.

NORTHBOUND:

  • Cupples Rd./Quintana Rd./East Kelly Railport
  • Frio City Rd.
  • Freeway merges onto US 90 eastbound
 
SPEED LIMITS
SP 371 speed limit map
  • 55 mph between US 90 and Cupples Rd.
  • 40 mph between Cupples Rd. and Port San Antonio entrance
 SP 371 speed limit map
   
SPECIAL FEATURES AND NOTES
SP 371 special features map
  • The interchange at US 90 only facilitates traffic from westbound US 90 to Spur 371 and from Spur 371 to eastbound US 90
 SP 371 special features map
   
TRAFFIC

Generally light traffic volumes. Traffic counts dropped substantially after the closing of Kelly AFB in 2001, then recovered a bit as logistics operations opened at Port San Antonio, but have stagnated in recent years even with the new development there.
 
AVERAGE DAILY TRAFFIC
LOCATION 2002 2012 2017 2019 2021 2022 '12-'22
% CHG
S of US 90 10,600 16,500 16,130 15,396 14,378 16,312 -1.14%
At Port SA 14,700 14,300 13,938 14,801 10,938 15,013 +4.99%


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Media gallery

Click here for video of this freeway.

Construction projects

There are currently no major construction projects in this corridor.

Future plans

Over the past two decades, the former Kelly AFB has been converted into a major industrial park and inland port named Port San Antonio (previously named KellyUSA). As Port San Antonio grows, traffic in and around is expected to grow. Therefore, part of the redevelopment plans included the proposed construction of an expressway (Kelly Parkway) connecting US 90 with I‑35 South, Loop 410 South, and SH 16 South; Spur 371 would comprise the northernmost section of that corridor. Improvements to the interchange at US 90 would be included. However, there is presently no timetable or funding for those projects.

History

Authorized by Minute Order 51835 (September 25, 1962). It originally had the unimaginative title of "Kelly Access Road", but its name was changed to General Hudnell Drive shortly after it opened. Major General William Hudnell retired as commander of Kelly AFB in 1965 and helped lead the effort to get this road built.