I have taken a keen interest in this matter and believe more should be done.
The Highways Agency is required by the Environmental Protection Act 1990 to ensure that motorways and a small number of trunk roads in England are, so far as is practicable, kept clear of litter and refuse. The Act is supplemented by a Code of Practice which specifies standards of cleanliness and response times.
A dedicated litter inspection is undertaken on the M67 at the beginning of each month which assesses the condition of the motorway and applies a grading for both litter and detritus in accordance with the Code of Practice.
Any required restoration measures take place within the required timescales, in accordance with the Code of Practice – 14 days for slip road carriageways, hard shoulders and verges and 28 days (or as soon as is reasonably practicable) for the main line carriageway, central reserve, hard shoulders and verges.
However, I intend to discuss with the Highways Agency what further steps could be taken to reduce litter on the Strategic Road Network.