Last updated: January 23, 2026
Article
Frozen Niagara Road Reroute Project
NPS Photo/ J. Cooper
Project Overview
The intersection of Frozen Niagara Road and Cave City Road in Mammoth Cave National Park will undergo an improvement project beginning in December 2025 and continuing until Fall 2026.
This project is designed to enhance safety and improve lines of sight for all motorists traveling through this area, ensuring a safer park experience for park visitors and staff.
The current layout of the intersection provides a limited range of visibility for motorists, creating potential safety concerns. Tour buses frequently use this intersection throughout the day taking tours to and from cave entrances. Buses returning to the visitor center must use the intersection that currently has restricted sightlines of vehicles approaching in the westbound lane of Cave City Road.
Improvements to the area will include:
- Rerouting and realigning the intersection of Frozen Niagara Road and Cave City Road to provide increased visibility for motorists and tour bus operators.
- Improved road signage and a permanent roadway gate.
- Enhanced safety for all motorists at a busy intersection on a primary park roadway.
Frequently Asked Questions
You may experience slight traffic delays as equipment enters and exits the roadway during construction. Delays are expected to be minimal and typically last no more than a few minutes. Flaggers will be on-site to manage traffic flow and keep delays as short as possible.
While it’s best to arrive at least 30 minutes prior to your cave tour, we recommend adding an additional 10 minutes to your commute if traveling to the park through the Cave City entrance during active construction. This will help ensure you arrive in plenty of time to check-in and meet your tour group for departure from the visitor center.
Visit our Park Improvement Projects page to learn more.