 The next change occurred between 1967 and 1970, when MD 410 was extended as a four-lane divided highway on a new alignment east past MD 201 to the Baltimore – Washington Parkway. This extension bypassed and replaced MD 412 between US 1 and the B-W Parkway. The adjoining segment of MD 410 between MD 500 and US 1 was also upgraded to a multi-lane divided highway by 1970. Finally, MD 410 was extended east on Veterans Parkway past US 50 to its current terminus at Pennsy Drive when that section of highway was completed in 1991.
