|Location Map ( geo)|
|Entering Hertfordshire at the western end of the C26|
|To:||County Boundary (TL129223)|
|Via:||Gosmore, Preston, King's Walden|
|Distance:||6.5 miles (10.5 km)|
|Meets:||C28, A602, B656, C210|
|Route outline (key)|
At the Hitchin end, there is an isolated stub of the original road that has survived being downgraded somehow when the Hitchin bypass and roundabout between the A602 and B656 was built, severing the original route and diverting the longer section to meet the other roads at the roundabout.