I drove the ICC on Sunday Morning. I started at Shady Grove and went to Laurel.
First thing I passed was a tow truck sitting on the right hand shoulder at a designated pull off up around Ga Ave. It was white or silver and had a circle shaped logo on the door...couldn't read it though.
Around the mid point, new Hampshire Ave, there was an MdTA cruiser parked in the median and facing the west bound traffic.
On my return trip from Laurel, I passed a Mont Co Police cruiser on the right hand shoulder with one vehicle pulled over. Somewhere in the area of Rt 29 I believe.
I passed the MdTA cruiser still sitting in the median (appeared to be using Lasar), but shortly after I passed him, about another mile or so, there was a Black Ford Excursion (unmarked but with MSP tags) with one pulled over on the west bound side as well.