Unity 3d surface properties gor driving on different surfaces

We have a driver training simulator game in unity 3d, wherein drivers learn to drive in different scenarios. We need to give real time experience of driving on sand, snow and rain. Objective is to provide slippery condition of roads when snow or rain scenario is activated. And to have a higher drag when vehicle moves over sand. This css as n be achieved by changing surface properties, or vehicle properties. We need expert to guide our designers to achieve this. Or find way to do this off line and do it.