Live B656 traffic updates as two-car crash closes road between Hitchin and Codicote There is slow traffic in the area and motorists are being advised to avoid the area Breaking News The B656 has been closed by police this evening (Thursday, May 13) after a collision involving two vehicles near near St Ippolyts. Hertfordshire Police said the road is shut the junction of the B656 and B651, near the Rusty Gun pub and between between Hitchin and Codicote, while emergency services deal with the incident. Herts Fire & Rescue Service and the ambulance service are also at the scene. Motorists are being advised to avoid the area.