Dave Harford on X: "I often go on about the blue & white marker posts like below on motorways used to identify your location. But what if you can't see any? Did
Driver location signs – can you read them? - Moto Motorway Services
CMPG on X: "Do you know what motorway marker posts mean? You do now! http://t.co/Zxd90KYA4q" / X
Driver location signs – Metrication UK
Driver Location Signs - Roader's Digest: The SABRE Wiki
Looking out for number one | Roads.org.uk
North West Motorway Police on X: "Marker posts are blue & white metal shields on motorway side. Eg Marker post 280.4A is 280.4km north of start of M6.. http://t.co/bJJes1UaAi" / X