Legal Question in Traffic Law in Illinois

Simply put, there is insufficient information to answer you as to what the "whole law" is..... There are lanes with hash-mark striping, solid striping, double striping.....etc. And as to weather conditions, you are supposed to take them into consideration when driving. All that being said, many situations become "issues of fact", meaning you may have to explain what happened to show you acted reasonably. Just because you get a ticket for "improper lane usage" doesn't mean you are automatically guilty.....