 Some restrictions apply. For complete details, please visit OptimaTaxRelief.com. WBAL News Radio 1090 and FM 101.5. Traffic. Traveling on Garrison Forest Road, northbound, southbound in Baltimore. You're going to find the northbound, southbound lanes are shut down between Glenbrook Avenue and Avery Hill Drive. That's where a fallen tree down across the roadway right at Walnut Avenue.