UDOT warns of one-way traffic, delays on Zion access road

One-way traffic and moderate delays are now the main planning issue on SR-9 into Zion, with fiber work active in Hurricane, Rockville and inside Zion National Park on the Zion-Mount Carmel Highway. UDOT says the corridor will keep seeing crews, equipment and traffic control through July 30.

The current work is split across three stretches: SR-9 in Hurricane between mileposts 4 and 5, SR-9 in Rockville between mileposts 28 and 29, and SR-9 plus the Zion-Mount Carmel Highway between mileposts 32 and 35 inside the park. A separate UDOT update says one section west of the Zion-Mount Carmel Tunnel, at mileposts 38-40, could face one-way traffic controlled by signals or flaggers, with delays up to 12 minutes.

For trip planning, the timing matters as much as the roadwork itself. UDOT says there are no work activities on Friday, July 24 for Pioneer Day, and work resumes at 9 a.m. Monday, July 27. That pause offers a brief break for holiday travelers, but it also confirms the project is still active enough to be managed around peak visitor traffic.

SR-9 is the main route for both Zion entrances, linking the park’s south entrance near Springdale and its east entrance near Mount Carmel Junction. That means the same construction can disrupt travelers coming off Interstate 15 in Washington County, drivers using US-89, and visitors moving between lodging in Springdale, shuttle access in Zion Canyon and day trips to the east side of the park.

The project itself is a regional fiber installation along SR-9 and the Zion-Mount Carmel Highway. UDOT-related project material says more than 50 miles of fiber optic cable are being installed, and a citizen portal summary said UDOT told the Rockville council the work started June 3, with about 2,500 feet trenched at that point. That same summary said crews were expected to reach Springdale and Rockville in one to two weeks and that the job would pause July 3-7 for the holiday.

For travelers with timed plans, the safest move is to leave extra room in the schedule, especially for early shuttle connections, hotel check-ins and trailhead starts. Even a moderate backup can ripple through the morning push into Springdale and the later return traffic out of the canyon, where the road’s one-way controls can slow the whole corridor.

Greater Zion’s travel alerts page also points visitors to regional information for Zion and St. George, along with a visitor information center in St. George. With SR-9 carrying the south and east entrance traffic at once, the roadwork can change the day before a hiker reaches the trailhead or a family reaches the tunnel, which is exactly why the current pause still deserves a closer look before Monday’s traffic returns.