August is one of the best months to cross Switzerland by motorcycle — which is exactly why everybody else is on the road too.
Holiday traffic, construction work and Alpine day trips all meet on a road network where one tunnel closure can push a surprising amount of traffic onto the same secondary road you planned to enjoy.
The good news is that most of the current restrictions do not make a Swiss motorcycle trip difficult. They simply make timing and route choice more important.
Below are the roadworks most relevant to riders for the remainder of August 2026, based on current information from the Swiss Federal Roads Office, ASTRA.
1. A1 St. Gallen: St. Fiden works, 14–17 August
The next significant weekend works on the St. Gallen urban motorway affect the St. Fiden section from Friday 14 August at 20:30 until Monday 17 August at 05:00.
ASTRA says individual entry and exit ramps need to close during the resurfacing work, while through traffic on the A1 remains possible.
What this means for riders: if St. Gallen is merely part of a longer east-west route, you should still be able to continue on the A1. If your route depends on a particular city exit, allow for a local diversion and check the current signage before arrival.
The timing also overlaps with a heavy summer-travel weekend, so a small access restriction can produce larger local delays than the closure itself suggests.
2. A2 Beckenried: more capacity on holiday weekends — but watch the changeovers
The Lehnenviadukt at Beckenried is under construction, but ASTRA has taken an unusual summer measure to improve traffic flow.
On weekends through 16 August 2026, the construction restrictions are temporarily removed and the motorway is available with two lanes in each direction from Friday at 05:00 until Sunday at 24:00.
That sounds entirely positive, and mostly is. The detail worth knowing is the transition.
During the night before Friday and the night before Monday, the traffic layout has to be changed. ASTRA says this requires two full closures of around 30 minutes per night. In addition, the Beckenried southbound entry ramp toward Chiasso remains closed.
What this means for riders: if you are heading for the Gotthard early on a Friday or returning very late on Sunday night, do not assume the weekend lane arrangement changes instantly. Build in margin.
3. Oensingen: the motorway is not the only place where the delay starts
At the VEBO junction in Oensingen, summer works are changing access to the motorway feeder and pushing additional traffic onto local roads.
From 8 to 16 August, only right turns are possible at the VEBO junction. From 17 to 28 August, entry onto the motorway feeder is closed.
ASTRA explicitly warns of local diversions and increased traffic in Oensingen and Niederbipp.
What this means for riders: this is a classic example of why a clear motorway can still produce an unpleasant approach. If your ride crosses the area, navigation apps may try to improvise through local streets at the same time as everyone else. A small pre-planned detour can be calmer than blindly following the fastest recalculation.
4. Wimmis and the Simmental: the long closure worth remembering
The Simmenfluhtunnel on the A6 near Wimmis is closed in both directions from 24 June until approximately 30 November 2026 for a comprehensive refurbishment.
Traffic is diverted onto the parallel cantonal road. ASTRA chose the full closure because the local alternative is direct and capable of carrying the diverted traffic.
There is another change approaching: the ramp from Spiez toward Wimmis at the Lattigen junction is planned to close from around mid-August until the end of October, with traffic again diverted via the cantonal road between Spiez and Wimmis. ASTRA has said detailed timing will be communicated separately.
What this means for riders: anyone heading toward the Simmental, Zweisimmen or onward mountain routes should not treat the A6 approach as business as usual. The alternative is straightforward, but peak traffic can accumulate where motorway traffic rejoins regional roads.
5. A2 Augst–Arisdorf: the ASTRA Bridge remains part of the route
The mobile ASTRA Bridge is in use on the A2 between Augst and Arisdorf while the road surface is renewed. For ordinary motorcycle traffic, the project is mainly something to expect rather than avoid.
Traffic passes over the temporary construction bridge while work continues underneath. ASTRA says traffic runs in two lanes over the structure at a reduced speed, allowing roadworks to continue during the day with less disruption than a conventional long construction zone.
The current phase in the Lucerne direction runs through the end of August.
What this means for riders: stay disciplined through the narrowed and altered alignment. Temporary surfaces, lane shifts and speed changes deserve more attention on two wheels than they do from inside a car.
Do not turn every construction site into a detour
Motorcyclists have one advantage during roadwork season: we often enjoy the alternative road more than the motorway.
But a detour is only better when it actually improves the ride.
Leaving a major route to avoid ten minutes of motorway traffic can place you on village roads already carrying diverted cars, buses and delivery traffic. In mountain regions, the “creative” alternative can also add fuel range, weather exposure and considerable time.
The useful rule is simple:
- For short restrictions, stay predictable. Follow the signed route unless you already know a better alternative.
- For long closures, plan before departure. Do not wait for the navigation system to make the decision in traffic.
- Check the return journey too. Weekend traffic layouts can change between your outward and return ride.
- Leave fuel margin. Slow summer traffic and improvised detours consume more time than distance suggests.
- Treat temporary road surfaces seriously. Fresh markings, ramps, metal covers and changing lane geometry are more relevant on a motorcycle.
And then there are the passes
Roadworks are only one variable in a Swiss summer ride.
High passes can still be affected by weather, incidents, maintenance or temporary local restrictions even in August. Conditions can change much faster than a static article can.
Before a long ride, check current official road information, the weather along the entire route and any specific pass you depend on. A route that works perfectly at breakfast can look very different after an Alpine storm in the afternoon.
The RTWR route strategy
For August 2026, there is no reason to avoid riding across Switzerland.
The better approach is to separate real closures from minor inconvenience.
St. Fiden is mostly an access issue. Beckenried is actually gaining weekend capacity. Oensingen can create local friction. Wimmis is the restriction that deserves to be built into a route from the beginning.
Know those four things before leaving and the rest becomes what motorcycle travel should be: adapting without turning the whole day into logistics.
Research date: 10 August 2026
Official sources: ASTRA — A1 St. Gallen resurfacing works; ASTRA — A2 Beckenried summer traffic arrangement; ASTRA — VEBO junction Oensingen; ASTRA — A6 Wimmis / Simmenfluhtunnel; ASTRA Bridge project.
Construction schedules can change because of weather, progress or operational decisions. Always verify current official traffic information immediately before travelling.