 This section began approximately northeast of Thrapston and terminated at a new roundabout on the A604, now merely an access to Thrapston industrial estate.The Thrapston Eastern Bypass was opened a few years later running northeast from this roundabout to a new junction with the old A605, just south of the Titchmarsh turn.Excavation of a Roman way station on the site of the junction proved disappointing, with no significant finds.