During one particularly bad snowstorm, my carpool buddy and I left for work 45 minutes earlier than normal. We arrived 3 minutes late. Had an excellent attendance record. Late once in 10 years. Never used more than 2 to 3 sick days a year. Supervisor came up to me after the harrowing drive (about 25 miles) to work and questioned me why I was late. Filed an harassment grievance and won. Never was ever questioned again about my attendance. Wasn't late ever again also.