The interstates are handled by the state DOT. I believe Charlotte DOT is responsible for the overpasses along the interstate route, unless that structure is part of a state highway.
Charlotte is a part of Division 10 ... along with Union Co., Stanly Co. and (I think ?) Cabarrus County.
Going by the RR information, that would make 47.14 their division-wide channel.
Many moons ago (prior to 1996, when I started dating my logs), I logged Charlotte dispatch during a winter snow using 47.38, with trucks on 45.72 MHz.
Keep in mind there are two yards in Mecklenberg County - I think. One is over in the Coulwood area, and I believe there is a second yard at I-485 and Hwy 74 in Matthews.
Sorry to be so vague about the information. I haven't listened to NC DOT in a long time.
BTW - DOT has a new procedure in place for snow removal on I-77 north of I-85. They now have to stop and pick up another DOT employee to ride in the passenger's seat before they can plow the HOV lanes :lol:
For those of you listening to "south of the border" traffic, SC DNR officers and vehicles were pressed into service along I-77 in the Upstate during last winter's worst driving weather days. The area DNR high band repeater channels were busy throughout the night, and officers regularly updated each other and Columbia regarding road conditions from Fairfield County to the NC state line.
Jeff