derek ward has the details. >> the strike began on monday.0 drivers traded their bus lines for the picket lines. at issue, their working conditions. >> wages, job security. >> things like a full lunch hour, one big problem that me of the drivers have are security cameras that have been mounted in the buses. the company put them there for security and safety. the operators say that they actually threatened their job security. because ose cameras can be activated by a quick application of the brakes. >> it's like step on the brakes. tryg to avoid an accident. most times we will get suspended or get -- i mean, get days off. >> 25 prince georges county routes are affected. service continues, but it's scaled back. >> we have trained replacement drivers we found from other locations, and some of our supervisory staff has been trained. people have to be cerfied and trained to drive safely. we have 31 buses of 60 operating. there will be more every day. >>eporter: so far passengers aren't feeling the pinch yet, and they prefer the bus over metro bus.

news 4's derek ward is there live and they're calling this cops and rooftops is the fund-raiser? >> reporter: indeed they are. you can take a look and see these officers are up there. usually when there are police officers on your roof, it's not a good thing. not the case today. they're actually there for a good cause. now at 1:00 p. today will actually mark the 31st hour atop this dunkin' donuts here on route 1 in laurel and they're up there for a good cause p. now up there are officers, the originator of this. they did it last year to raise money for the maryland special olympics. again, this is the second year they've done it. weather has been weird. it was in the 90s yesterday. today it's in the 60s and raining. but thatas not dampened their spirits. they're joining me now, dewalt of the laurel police department. you're telling me they're already ahead of where they were this timeast ear. >> yes, we raised $7,000 for special olympics maryland last year and we're close to about $8,000 now. >> reporter: th is the corporal's idea, isn't it? >> corporal beth thomas. i had nothing