The Gotthard Pass will reopen on Friday, which is earlier than planned.
The Federal Roads Office says the winter closure can be lifted thanks to light snowfall and rapid clearing and repair work on the mountain route.
The reopening will help ease pressure on the A2 autoroute during the busy Ascension and Whitsun travel weekends.
At the same time, the extended exit lane at Göschenen will also return to service, designed to reduce traffic diverting through local villages during peak congestion.
Your pictures of the eclipse
You sent in your pictures of the eclipse - many thanks
Copernicus reports hottest summer ever measured
Switzerland is in the grip of a level 3 heat alert, with Geneva heading for temperatures of up to 36°C on Friday.
Tough new banking rules possible
The Federal Council has launched consultations on new banking rules that could withhold or claw back bonuses from top banking executives.
Speed crackdown affects all of Switzerland
The Federal Council has tightened the rules for imposing 30 km/h zones on city streets, requiring cantons to prove that a slowdown will not push traffic into residential neighbourhoods
Back to school concern over heat
Vaud is preparing to map every school building in the canton to identify the classrooms most vulnerable to extreme heat
Eye warning for eclipse watchers
Anyone who watched Wednesday's solar eclipse without proper glasses should watch for signs of retinal damage, doctors are warning
