SHARROW [Good and bad advice.]

[B' Spokes: Sharrows are used when there is not enough space for a bike lane, sometimes sharrows can create a quasi safe place for riding side by side with motoring traffic and sometimes not. But it is noteworthy to point out that in Maryland sharrows are used on roadways where it is legal for a cyclist to use a whole lane. So use your best judgment, avoid the door zone of parked cars which means avoid the sharrows as well (if minimal guidance is followed, which it usually is, see pic)
by Dan Gutierrez

So without further ado here is the City of Annapolis' take on sharrows (but major kudos for being the first government agency to try to get at least this much info out there):

What does a SHARROW mean for motorists and bicyclists?

Motorists

• Expect to see bicyclists on the street
• Remember to give bicyclists at least three feet of space when passing
• Follow the rules of the road as if there were no SHARROW

Bicyclists

• Use the SHARROW to guide where you ride within the right hand side of the lane and with the direction of traffic
• Remember not to ride too close to parked cars
• Follow the rules of the road as if there were no SHARROW

http://www.annapolis.gov/Government/Departments/Transportation/BikeAnnapolis/SHARROW.aspx