Calanca Road: complete closure between Molina and Arvigo

Context

TL;DR

• Total closure from Wednesday at 21
• Stretch: Molina Nord–Cave di Arvigo
• MeteoSvizzera forecasts rain above the critical threshold
• Indicative reopening on Thursday, October 8 at 18

Key facts

• Section → Molina Nord–Cave di Arvigo
• Decision → Graubünden Civil Engineering Office
• Reason → precipitation above the critical threshold
• Closure → Wednesday at 21
• Indicative reopening → Thursday, October 8 at 18
• Condition → carriageway completely clear of rocks
• Subsequent traffic regulation → traffic light day and night
• Updates → strassen.gr.ch page

At 21 on Wednesday, the Calanca Road will be completely closed to traffic on the section between Molina Nord and the Cave di Arvigo. The measure applies in both directions and was decided by the Graubünden Civil Engineering Office for safety reasons.

Reasons and schedule

The closure is preventive. The forecast precipitation, particularly on Thursday, is expected to exceed the critical threshold according to MeteoSvizzera. The cantonal office has therefore applied the provisions of the Safety Concept of September 4, 2026, ordering a stop for the indicated section.

The announced window runs from Wednesday at 21 to Thursday, October 8 at 18. The source nevertheless specifies that both times are indicative. Changes in weather conditions may alter both the time of closure and that of reopening. Anyone planning to travel through the area must therefore read the notice as an operational window, not as a guaranteed time of passage: the final decision will depend on the weather and the checks.

For almost two weeks, following the debris flows on August 20, the section had been impassable. The new interruption is motivated by the amount of rain expected and the need to keep traffic between Molina Nord and the Cave di Arvigo safe.

The reopening will not take place automatically when the stated time expires. It will be subject to safety checks and may occur only if the carriageway is completely clear of rocks. The requirement therefore concerns the actual condition of the road, in addition to the communicated time limit.

With the reopening, the provisions of Notice 14 will apply again. Traffic will be controlled by a traffic light both during the day and at night. For always-up-to-date information, the indicated reference is the strassen.gr.ch page. Those who need to coordinate other journeys can also consult mezzi pubblici, while still treating the Civil Engineering Office's communication as the reference for the road's status.

Operational details

What changes for those who need to pass through

For those traveling along the Strada della Calanca, the measure entails three distinct operational steps. During the closure, one-way traffic is not provided for: the blockage is total and applies in both directions. This rules out the possibility of crossing the segment between Molina Nord and Cave di Arvigo during the indicated window. The notice therefore describes a complete stop, not partially regulated traffic along the stretch.

The second point concerns the relationship between the schedule and actual conditions. The reopening time of 18 should not be treated as an automatic guarantee. If weather developments change the situation, the announced time may also change; in any case, before traffic resumes, safety checks must be completed and the carriageway must be clear of rocks. For anyone with a shift, an appointment, or a delivery, this means coordinating the departure time with the latest available update, not just with the initial notice.

After reopening

The next step does not necessarily coincide with the restoration of unrestricted traffic. Notice 14 provides for a traffic light both during the day and at night. The source does not indicate waiting times, cycle durations, or other technical details: it is therefore not possible to estimate delays or quantify the time needed to cross the stretch. The practical point is the change in regime, from total closure to regulated traffic.

The sequence also matters for those planning recurring travel in Graubünden. First comes checking the closure; then confirmation of the reopening; finally, consideration of the traffic light. Consulting mezzi pubblici may help organize general mobility, but it does not replace the official update on the Strada della Calanca.

The situation shows a distinction worth keeping in mind: the announced time serves as a guide, while weather, checks, and the condition of the carriageway determine actual passage. For this reason, anyone traveling between the two ends of the stretch should check the situation every time their departure falls within the relevant window.

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Key points

Four steps before setting out

Anyone who needs to cross the section can follow a simple procedure based on the conditions indicated in the notice.

1. Check the section. Compare your trip with the Molina Nord–Cave di Arvigo segment. If the route includes that section, consider the relevant notice: the closure applies in both directions.

2. Check the time window. If departure falls after Wednesday at 21 and before the time indicated for Thursday, October 8 at 18, do not use the time as the only information. The endpoints are indicative and weather may alter them.

3. Check for updates. Before setting out, consult the strassen.gr.ch page, identified as the source for always-up-to-date information. This check should be repeated when weather conditions change or when the announced time approaches.

4. Wait for actual confirmation. Even the arrival of 18 is not enough on its own. Reopening depends on safety checks and the roadway being completely clear of rocks. Until this condition is met, the passage must not be considered reopened.

After confirmation, plan your trip taking the subsequent traffic arrangement into account. Notice 14 provides that traffic will be controlled by a traffic light both day and night. The procedure does not make it possible to determine a waiting time, because the source does not state one; it does, however, make it possible to distinguish the moment of reopening from the practical organization of traffic.

For those who need to coordinate work, appointments or other commitments, it is advisable to retain the last update consulted and check the page again before departure. To organize general mobility, consult mezzi pubblici.

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