New Jersey is cracking down on motorists who stay in the left lane by upping fines.
Gov. Chris Christie has signed into law a bill that raises the penalties for violating the state's keep-right law from $50 and $200 to between $100 and $300.
Motorists in New Jersey are required to stay in the right lane unless they are passing slower traffic.
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The bill's sponsors say staying in the left lane creates a dangerous situation for other motorists.