are groupings of aActions based on the relative thickness and/or level of effort of the action.  Reconstruction aActions are considered Hheavy (see 3R) where a thin overlay action is considered light (see 1R) or maybe even non-structural.  The reason these exist is These categories are used to help maintain a mix of fixes across the different wWork tTypes included in the recommendations for candidate projects coming out of Pavement Management.