Police issued a statement
Hertfordshire Police has confirmed the road is closed in both directions.
The force said in a statement: “Police were called at 3.55pm today to reports of a road traffic collision involving a black moped on the M1 travelling northbound near to junction 8.
“Officers are in attendance along with colleagues from East of England Ambulance Service and Herts and Essex Air Ambulance Service.
“The carriageway is closed in both directions between junction 8 (Hemel Hempstead) and junction 9 (Luton), we ask that motorists seek alternative routes and avoid the area at this time.”