Marcelino Serna – Tornillo

CBP identifies this Texas–Chihuahua crossing as Marcelino Serna Tornillo, with wait-time entry 240401. The bridge is also known as Tornillo–Guadalupe. When looking up a route, keep both the bridge name and the CBP number handy to distinguish this report from other crossings in the region.

CBP lists the port's hours as 6 a.m. to 10 p.m. Those are port hours; the availability of a particular type of service or lane can differ. Check the current notice before you travel.

The CBP wait list has separate categories for passenger vehicles, pedestrians and commercial vehicles. People crossing on foot should consult the pedestrian category instead of borrowing the passenger-car estimate.

For freight, the CBP notice lists cargo service Monday through Friday from 8 a.m. to 4 p.m., with Saturday and Sunday closed. That is a shorter schedule than the port listing. Recheck the notice for changes and arrange the shipment around the applicable cargo hours.

CBP's readings describe the trip into the United States. Find the category for your vehicle or for walking, and check both the reported wait and operational status. A closed lane or an update pending should not be interpreted as a zero-minute queue.

The display is a current estimate, not a reservation or a guarantee of the time you will spend at inspection. Check again near departure, allow flexibility, and follow the signs and officers' instructions at the bridge.

Before the return to the United States, review the entry documents required for each person according to citizenship and immigration status. CBP's Western Hemisphere Travel Initiative guidance lists accepted documents for U.S. citizens entering by land.

Keep the required documents accessible at the inspection point. If you are traveling with others, check everyone's documents before setting out rather than assuming that one person's requirements apply to the entire group.

The U.S.-bound wait is not a forecast for the southbound journey. Check your Mexico-bound requirements separately, including any arrangements needed for your vehicle and the roads on your itinerary.

Arrange liability coverage valid in Mexico before driving there. Mexican federal-road rules require insurance for injury or property damage to third parties. Review coverage and exclusions and verify that the insurer is authorized; keep your policy details with the rest of your travel documents.