Some businesses in Northamptonshire say they are losing money because of delays in roadworks on the M1.
The ongoing works to replace the central reservation from Junction 19 to Junction 15 started last August.
Highways England says it has put a 50mph speed limit in place to protect drivers and the workforce. But some courier firms say accidents and breakdowns on that stretch end up costing them time and money.
Click below to watch a clip with Elaine Harries, the Managing Director at Action Express:
Queueing traffic and one lane closed due to an accident involving a car and a van, M1 southbound between J15, A45/A508 (Northampton) and Newport Pagnell Services.
One lane is closed on the M1 London bound between J15 A45 / A508 (Northampton) and J14 A509 (Milton Keynes) and there are long delays after a serious accident.
The accident happened outside the Newport Pagnell Services at around 4.30pm. The lane is expected to remain closed for much of the night.
Two lanes are closed and traffic is queueing following an accident on M1 Northbound at J15 A45 / A508 (Northampton), and there is congestion to J14 A509 (Milton Keynes).
One lane is blocked after an accident on the M1 in Northamptonshire. The incident happened about a mile and a half from Junction 17, close to the Watford Gap Services.
Traffic is queueing and one lane ia blocked after an accident involving three vehicles M1 Southbound after Watford Gap Services and J18.
Two lanes are closed southbound and traffic is slow due to vehicle fire between J17 M45 (Dunchurch/Coventry) and J16 A45 / A4500 (Daventry)
M1 Northbound entry slip road partially blocked due to recovery work at J15A A43 (Towcester)
Queueing traffic due to lorry fire on the northbound carriageway on M1 Southbound between J17 M45 (Dunchurch/Coventry) and J16 A45 / A4500 (Daventry).
Very slow traffic and one lane closed due to recovery work and accident on M1 Northbound around J15A A43 / A5123 (Towcester / Northampton Services), congestion on M1 to Before J15 A45 / A508 (Northampton).