Phahonyothin Road
Nakhon Sawan lies on Route 1 (Phahonyothin Road), which runs from Bangkok through Ayutthaya and Saraburi before passing through Nakhon Sawan, then continues through Kamphaeng Phet, Lampang, and Chiang Rai until it reaches the border with Burma at Mae Sai. Route 117 leads north to Phitsanulok, and Route 225 leads east to Chaiyaphum.