Anglian Water workers have been digging up a section of Rectory Road and will re-instate it over the next 24 hours.
A spokesman said: "We are hoping to have the traffic lights removed by the weekend and apologise for any inconvenience this has caused.”
A signed diversion is in place.
The closure has meant a route change for the 107 bus which transports some pupils from Bishop Stopford School in Kettering.
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There are no changes to the morning collections but there slight changes which will take place on the journey home until December 10.
The Finedon drop-off will remain the same and the bus will then drop off in Rushden at Orbit Tyres and Hayway. Students may be dropped off a few minutes earlier than normal.
The bus will then drop off in Higham Ferrers. Students may be dropped off a few minutes later than normal.