County Road 456 (Fv456) is a county road in Vest-Agder, Norway. The road takes over for European route E39 in Hannevika, Kristiansand, in to the borough Vågsbygd. Therefore this part is called the Vågsbygdporten and goes threw a tunnel under Slettheia.
The road continues south through Vågsbygd and goes west when it comes to Voiebyen. It then goes past Bråvann and into Søgne municipality. In Søgne, the road goes through Langenes and is therefore called Langenesveien or Langenessletta. County Road 456 goes past places like the church in Søgne and the only high school in Søgne. The road ends in Søgne centrum, Tangvall. It leads through the centre and stops with E39 again
Length: 19.80 km (12.30 mi)
Existed: 2010 – present
North end: E39 in Hannevika, Kristiansand
South end: E39 in Tangvall, Søgne