vehicles over 7.5 tonnes traveling east were banned from using the outside lane on a dual 2-lane section on a steep climb to welford summit close to junction 1 (a5199) from spring 2007; a similar scheme covered of the westbound carriageway from junction 2, including a particularly steep climb to naseby summit. the bans are active between 6am and 8pm and are intended to reduce delays to other traffic from lorries attempting to pass on these climbs.