Traffic is moving along Tennyson Avenue again now, with vehicles allowed to access the College of West Anglia campus in Lynn.
Buses can now come on-site to collect students as usual. The side pedestrian gate to Gaywood Road will now be locked as normal.
This follows a chemical leak at the college earlier today, which caused staff and students to be evacuated. One was aken to hospital and others were assessed for breathing problems.
See www.lynnnewscitizen.co.uk for more on the incident.