About
Navigate Houston's downtown underground tunnel system with this mobile guide. Discover routes between buildings, dining, and transit, and find open entrances and hours. Optional location access helps pinpoint your position for accurate routing.
What's New in HTX Tunnels
1.0
February 23, 2026
Developer apps
FAQ
What is HTX Tunnels?
HTX Tunnels is a mobile application designed to help users navigate the underground tunnel network in downtown Houston. It provides information on routes, entrances, and points of interest within the tunnels.
Is HTX Tunnels free to use?
Yes, HTX Tunnels is available for free. The application does not require any payment to download or use its navigation features.
Does HTX Tunnels have ads?
No, HTX Tunnels does not contain advertisements. Users can enjoy an ad-free experience while navigating the tunnel system.
What devices support HTX Tunnels?
HTX Tunnels is compatible with iPhone, iPad, and iPod devices. It is designed for the iOS ecosystem.
How accurate is HTX Tunnels' location tracking?
Location access is optional and used to show your position and improve routing accuracy. Motion sensors can also assist with underground positioning for better accuracy.
Can I find ADA-friendly paths with HTX Tunnels?
Yes, HTX Tunnels allows users to spot ADA-friendly paths and detours within the tunnel network, making navigation more accessible.
How often is HTX Tunnels updated?
The latest version of HTX Tunnels was released on February 23, 2026, indicating recent development and potential for future updates to maintain functionality and information accuracy.
What is the age rating for HTX Tunnels?
HTX Tunnels has an age rating of 4+, making it suitable for a wide range of users. This rating suggests content is appropriate for young children.