A railroad crossing is marked exempt, but cross traffic is heavy and visibility is reduced. What does the Colorado passenger section require?

1. You do not have to make the full stop solely because of the exempt marking, but you must slow down and carefully check for other vehicles
2. You may cross at full speed because exempt means no hazard exists
3. You must stop between 15 and 50 feet because every exempt crossing is still unregulated
4. You may ignore road traffic because only trains matter at exempt crossings