Hi the following are due to be closed for roadworks:
https://www.waze.com/editor/?env=row&lon=-0.22540&lat=51.77813&layers=645&zoom=4&segments=147679172&mapProblemFilter=0&mapUpdateRequestFilter=0&venueFilter=0
https://www.waze.com/editor/?env=row&lon=-0.22504&lat=51.78271&layers=645&zoom=4&segments=147679126&mapProblemFilter=0&mapUpdateRequestFilter=0&venueFilter=0
https://www.waze.com/editor/?env=row&lon=-0.22504&lat=51.78271&layers=645&zoom=4&segments=146682487&mapProblemFilter=0&mapUpdateRequestFilter=0&venueFilter=0
Reason for closure: Resurfacing
Start Date: 26 May 2016
End Date: 8 June 2016
Start Time: 8pm daily
End Time: 5am daily
(i.e. closed every night between 26th May and 8th June, but open during the day).
Info gathered from local signage, and https://hertfordshire.roadworks.org/