Roundabout Construction at the Sweeney-Nealy-Hammond Intersection


By 2025, recent traffic studies show the traffic density at the Sweeney-Nealy-Hammond intersection is expected to nearly double during the peak AM and PM commute. Construction of a roundabout is planned for Langley Air Force Base beginning June 2022. This construction project will result in continuous traffic flow and prevent stop-go traffic along the Sweeney Avenue corridor as compared to the current traffic light control at the intersection.

JBLE Roundabout Construction Plan

Roundabout construction at the Sweeney-Nealy-Hammond Ave. intersection will begin the week of 13 June.  Base housing is closed to through traffic, however, detours are available via Cook and  Nealy Avenues, or via King Street Gate. To minimize traffic during peak hours, Langley personnel are encouraged to use the *NASA Langley Research Center’s Durand Gate.

DURRAND GATE | Monday – Friday
Inbound Traffic : 0600 to 0830
Outbound Traffic : 1600 to 1800

*A Department of  Defense (DoD) Common Access Card (CAC) is required by every member traversing through NASA entry control points. DOD Reserve/Retired identification cards are also accepted for the purposes of entering/exiting JBLE.

For inquiries, contact the Langley Roundabout Messaging System at (512) 508-9935. To submit inquiries, track progress, and find more information about the project, visit on your smart phone or personal browser.



Access to the LaSalle Gate is available via east Sweeney. Follow the detour to make a slight left turn while westbound on Sweeney to get onto Nealy Avenue, then pass the Hospital to the LaSalle Gate.

Northbound Hammond Avenue is closed. To depart the base via the Armistead Gate, drive east on Dodd Blvd, then make a sharp left turn on Sweeney to proceed westbound.

June 2022 - Spring 2023

PHASE 1 | Demolition of north Hammond Ave. and construct the southern two-thirds of the roundabout.    

TRAFFIC IMPACT | Minimal through August as the existing traffic signal will remain operational.

  • North portion of Hammond Ave closed
    • ACC traffic: Sweeney to Cook Ave. detour
    • Alternative to use King Street Gate
    • North Gate from NASA re-opens 31 May
  • Reduce speed through the intersection
  • Caution for construction lane barrels
  • Note detour and caution signs
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