Motorway with junction and junction number, service areas (full and limited access)
Motorway junction with limited interchange
Motorway under construction, proposed, with opening date where known
Primary route with service area full and limited opening
Primary route with roundabout or multiple level junction, full and limited interchange
Primary route under construction, proposed
Main road with toll and road tunnel
Main road with roundabout or multiple level junction
Main road under construction, proposed
Secondary road with gradient steeper than 1 in 7 or 14%
Narrow road with passing places
Road generally more than 4m wide
Road generally less than 4m wide
Road with restricted access
Distances in miles between markers