The CBR (California bearing ratio) value is a penetration test that evaluates the mechanical strength of subgrades and basecourses that lay beneath new road constructions or pavements.

The longest A Road The longest road in the UK is the A1 which is 410 miles long and goes from London to Edinburgh.

Roads are used in our day to day life, however little thought is put into how the road was made.

Plate bearing test is an activity carried out by design engineers in the field to determine the bearing capacity with regards to the soil underneath.

In previous methods, widening motorways was approached without effective conservation.

What are the typical CBR values?

What is the CBR test procedure on site and how does the process work?

What equipment is used for a CBR test?

The CBR test is covered by part 9 of the British Standard BS1377 which covers soils for civil engineering purposes.