Friday is National Bike to Work day, and commuters are encouraged to ditch the car for the pedals on their way to the office.

The weather for the day looks questionable, but there are a number of events and happenings throughout the region to celebrate this emission-free commuting option.

There will be more than 100 pit stop events throughout the region, and those that register in advance can get a free t-shirt and other goodies. Many political leaders and other notable people will be on hand at many pit stops.

If you do plan to drive to work Friday, be aware that there will be a lot of cyclists on the road, and many of them aren’t experienced riders.

“Given the magnitude of cyclists commuting to work Friday, motorists should avoid driving in bike lanes tomorrow, or on any other day, even if they are just edging in by a foot or two,” the American Automobile Association said. AAA stressed that drivers should try and give at least three feet of clearance when passing a bicycle on the roadway.

Here are some other things to know for National Bike to Work Day.

MARC Bike Car - The regional rail service currently offers special cars for full bikes during its weekend service and is considering adding them for weekday service on the Penn Line. For now, look for them to be added on trains for Friday’s National Bike to Work Day on select Penn Line trains and one Brunswick Line train. See the Bike Car Schedule.

Pop-Up Bike Lane in Bethesda - As part of National Bike to Work Day, the Montgomery County Department of Transportation is installing a pop-up bike lane in downtown Bethesda. The lane will be available on May 18 from 6 a.m. to 8 p.m. and stretch along Woodmont Drive from Cheltenham Drive to Bethesda Avenue. Read more.

DC Bike Ride - EventsDC is hosting this 20-mile recreational ride on car-free streets from 8:30-12:30 p.m. The route takes riders past many monuments and finishes not far from the U.S. Capitol, where there will be a Finish Festival with food and Go-Go music. Read more.