From the graph, most accidents happen on the single carriageway with 17,192 accidents. Most of the accidents happend in urban areas compared to rural areas; this might be because urban areas are more populated and there is more traffice. Rural areas possess less population so there is less traffic as well which lowers the risks and numbers of accidents. People from rural areas might be travelling to urban areas for work and other reasons which might affect the absolute number of accidents in urban areas.As reported on https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/230556/Travel_in_urban_and_rural_areas_personal_travel_factsheet___March_2010.pdf, people living in rural areas travel more distances compared to people who live in urban areas. This might be because people living in rural areas travel to cities often compared to people who live in urban areas.
The most excessive number of accidents recorded in an urban area on a Friday was 31,217. The reason for this might be because people are in a hurry to get home and are more exhausted since it is the last day of the week, as stated on https://www.harvillelaw.com/blog/car-accidents-likely-happen/. The least accidents happened on Sunday and Saturday with an average of total accidents of 24.634. This might be because people are less likely to travel on their days off and spend time at home so there are fewer vehicles on the road during these days of the week.