Essex Police shut the A120 between Stansted Airport and Dunmow this morning (April 23) while officers responded to a welfare issue.
The Essex and Herts Air Ambulance attended the incident.
The busy road was shut in both directions, but has since reopened.
A police spokesperson said: "We were called to concerns for a man on the A120 near Stansted shortly before 8.45am."
A diversion was in place through Takeley using the B1256, with heavy traffic westbound between the B1008 Dunmow South junction and the closure at Dunmow West.
If you are affected by this incident and would like mental health help and support, you can call the NHS on 111 and press option 2 for the 24/7 first response service. Alternatively, contact a Samaritan on 116 123 or via email at jo@samaritans.org.
For up-to-date information about the county's roads, visit our LIVE Essex traffic map.
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