The Maryland Transportation Authority will hold the first of two public hearings on its toll plan for the Intercounty Connector from 6 p.m. to 9 p.m. Wednesday in Beltsville. The hearing at High Point High School, 3601 Powder Mill Road (Route 212), is the closer to Baltimore of the two hearings. The other will be held during the same hours Thursday at Shady Grove Middle School, 8100 Midcounty Highway in Gaithersburg. Under the plan, motorists driving passenger vehicles could be charged as much as 35 cents a mile during peak driving times and up to 30 cents a mile for off-peak trips. That means a trip along the full length of the ICC could cost about $6 each way.