Formerly, the frontage road of the Grand Central between BQE and the RFK Bridge served as a truck route, since large trucks are not permitted on the parkway. Exemptions are provided for smaller trucks that conform with strict regulations, but only on the section of the Grand Central that overlaps with I-278. In December 2017, the state concluded a $2.5 million project that lowered the roadbed of the section of the parkway that is concurrent with I-278. This section of I-278 now has a vertical clearance, which allows most trucks to stay on I-278.