The closures, part of the Little Hadham bypass work, mean traffic will be diverted via the A10, the A414 to Harlow and A1184 through Sawbridgeworth.
The closure order is to come into force on November 11 and the work must take place during the following 18 months.
County council reiterates its commitment to get developers to foot the bill for services to support new homes.
The event was the culmination of the fourth annual week-long Sawbo Travel Challenge involving pupils at five primary and infants' schools in the area.
Councillors are now refereeing complaints about inconsiderate parking, excess noise and light pollution.
Hertfordshire County Council is building a £40m single-carriageway relief road to the north of the village between two new roundabouts.
Crews from highways contractor Ringway ready to cover more than 1,500 miles of roads 24/7 for six months through whatever winter throws at them
Police have launched an appeal to find a motorist who stopped to help a vulnerable man who was found next to the main road in severe distress.
Pupils at the five primaries in the Sawbridgeworth area have been ditching the car for the school run in favour of feet, bikes and scooters
'Effective bus network' is the aim of the county council as Hertfordshire grows
The authority is also offering supplies to resident and community groups, and district, town and parish councils