The road was periodically improved and in 1950 the cantonal authorities created a plan whereby the pass could be kept open all through the year, and not closed to traffic between October and late April like most Alpine passes at this altitude. The improvements included several lengthy avalanche shelters along the more exposed stretches of road and the expansion of certain road tunnels to accommodate full size tourist coaches which were significantly taller than the post buses used for local passengers. In October 1970, a party of journalists was invited to inspect the improvements and it was announced that the necessary improvements had been implemented on of the between Brig in Valais and the Italian frontier at Gondo, that 110 of the 180 million Swiss francs budgeted to the project had been spent and that, while a further five years would be needed to complete all the projected improvements, the Simplon Pass could now be used safely all through the year.