Police were called out to the A12 near Colchester amid reports a garden shed was obstructing the road.
The force control room revealed the weird callout on Twitter at lunchtime.
Traffic maps revealed the incident, close to junction 25 at Marks Tey, caused some delays on the northbound carriageway.
Traffic heading eastbound on the A120 was worse affected, with cars slow-moving as far back as Coggeshall.
The force control room tweeted that officers from Colchester and roads policing were running to information of a garden shed that had somehow made its way onto the A12 in Marks Tey, but that no two calls were ever the same.
The latest traffic maps by the AA show congestion had eased in the area and the shed had been moved off the carriageway.
An AA traffic map was reporting that an object had been in the road, just to the north of junction 25 since 12.45 am.
Additionally, according to the AA traffic map, there seemed to be some congestion on the A12 near Marks Tey, causing delays of three minutes.