Park Heights Avenue was paved from the Baltimore city limits near Cold Spring Lane north to Caves Road by 1910. The avenue was proposed for improvement south to Reisterstown Road. There were also plans to improve Park Heights Avenue north to its current terminus and extend the avenue toward northern Baltimore County along the route following by Garrison Forest Road, Greenspring Avenue, Tufton Avenue, Mantua Mill Road, Green Road, Butler Road, and Falls Road north to Mount Carmel Road.
By 1910, Park Heights Avenue had been paved from near Cold Spring Lane up to Caves Road. The avenue was suggested for enhancement southward toward Reisterstown Road. Plans also existed to extend the avenue northward to its current endpoint and further along Garrison Forest Road, Greenspring Avenue, Tufton Avenue, Mantua Mill Road, Green Road, Butler Road, and Falls Road to Mount Carmel Road.