Question: what is type 1 road?
Answer: The Highway Agency's Specification for Highway Works, Clause 803 (SHW 803). Also known as GSB TYPE 1 or MOT TYPE 1 - this is a granular material with a maximum permitted top size of 63mm, graded down to dust. Type 1 must be of a crushed nature to provide a stable sub-base for road surfaces and pathways.