SPRINGFIELD — State lawmakers advanced a measure Thursday that would reduce low-level cannabis penalties, making them more like traffic violations.On a 62-53 vote, the Illinois House passed Rep. Kelly Cassidy’s proposal to make possession of up to 15 grams — roughly half an ounce — of any cannabis-containing substance punishable with a fine ranging from $55 to $125.Without overriding any existing municipality rules, the bill would create a uniform state law by which police could penalize offenders …