National Road 40 (), is a Swedish national road in southern Sweden, between Gothenburg and Västervik. The length of the road is 321 km. The stretch GothenburgâÂÂJönköping is a part of the fastest and most used route when driving between Gothenburg and Stockholm. The road is a motorway along 96 km between Gothenburg and Ulricehamn. It is a 2+1-road with a middle barrier along 84 km between Ulricehamn and Nässjö.
Until 1 April 2009, National Road 40 only ran between Gothenburg and Jönköping. It was merged with National Road 33 which ran from Jönköping to Västervik.