For further information, including changes to planned works, log on to www.highways.gov.uk/traffic.A1 Brampton Hut to Sandy: routine maintenanceWork to improve safety by carrying out routine inspections of electrical equipment and structures begins this week. Lane closures will be in place overnight, between 8pm and 6am, until summer 2017A1 Sandy to Black Cat, Bedfordshire: drainage improvementsWork to improve journeys by renewing drainage on the A1 continues this week. Lane closures will be in place overnight, between 8pm and 5am, from Monday 27 March for five nights.A14 Cambridge to Huntingdon, Cambridgeshire: major improvementsEarly preparatory construction work on the A14 Cambridge to Huntingdon scheme has been underway for a number of months and main construction has now started. We are currently carrying out a variety of tasks for which we need to close lanes or carriageway on the A1, A14 and some local roads, usually overnight between 8pm and 6 am unless otherwise stated. The work includes: Creating safe crossing points for plant on a number of local roads Installing access points to our construction compounds Taking core samples of the existing A1 and A14 carriageways to help us plan construction Clearing sites next to the live carriageway of vegetation Installing CCTV and average speed cameras Installing information boards For this week, the planned road closures are:Monday, March 27 A1307 inbound between A14 and Girton.Tuesday, March 28 A1307 inbound between A14 and Girton.Wednesday, March 29 A1307 inbound between A14 and Girton.Thursday, March 30 A1307 inbound between A14 and Girton.Friday, March 31 A1307 inbound between A14 and Girton.For this week, the planned land closures are:Monday, March 27 A14 eastbound junction 31 lane two closed and two way off peak traffic lights Ermine Street.Tuesday, March 28 A14 eastbound junction 31 lane two closed.Wednesday, March 29 A14 eastbound junction 31 lane two closed.Thursday, March 30 A14 eastbound junction 31 lane two closed.Friday, March 31 A14 eastbound junction 31 lane two closed and A1 southbound between Alconbury and Brampton Hut lane one eastbound.A14 Spaldwick: safety fence upgrade Work to upgrade the verge side safety barrier at the side of the road in two locations around Spaldwick starts this week. There will be a temporary 50mph speed limit in place 24 hours a day and at weekends. The slip road at junction 18 (Spaldwick) will be closed from Monday, March 27, for three nights overnight, between 8pm and 6am. Traffic will be diverted to travel to junction 18 and then to return eastbound to junction 18.A428 Eltisley, Cambridgeshire: street lighting and road markingsWork to replace the studs in the centre of the road will be done this week. The A428 will be closed through Eltisley between both junctions with the B1040 overnight, between 8pm and 6am, from Monday, March 27, for two nights. A clearly signed diversion for westbound traffic will be in place for divers to take the A1198 at Caxton Gibbet, then, at Godmanchester follow the A14 westbound to junction 21, at Brampton Hut take the A1 southbound and then follow the A1 to Wyboston roundabout. Drivers heading eastbound will follow this diversion in reverse.