Joint reflection cracking is measured in linear feet (meters). The length and severity level of each crack should be identified and recorded. If the crack does not have the same severity level along its entire length, each portion should be recorded separately. For example, a crack that is 50 ft. (15 m) long may have 10 ft. (3 m) of a high severity, 20 ft. (6 m) of a medium severity, and 20 ft. (6 m) of a light severity. These would all be recorded separately. If the different levels of severity in a portion of a crack cannot be easily divided, that portion should be rated at the highest severity present.