Interstate 97
I-97 begins at US 50 and US 301 (John Hanson Highway), which run concurrently with unsigned I-595, on the edge of the community of Parole west of Annapolis. The freeways meet at a semi-directional T interchange; the ramp from I-97 to eastbound US 50 and US 301 merges with a collector-distributor road that extends east to that freeway's interchange with MD 665 (Aris T. Allen Boulevard). I-97 heads northwest as a four-lane freeway with a speed limit of . The freeway crosses over MD 450 (Defense Highway) and passes along the south and west sides of Crownsville, where it crosses several tributaries of the Bacon Ridge Branch of the South River. North of Crownsville, I-97 has a partial interchange that comprises a pair of long ramps to MD 178 (Generals Highway); the interchange allows access from southbound I-97 to MD 178 and from the state highway to the northbound Interstate. I-97 gains an extra lane in each direction from the MD 178 ramps; those extra lanes split off at the freeway's partial interchange with the eastern end of MD 32 just north of Millersville. The Interstate curves northeast and has a complementary partial interchange with the northern end of MD 3 (Robert Crain Highway). The two state highways meet each other at a six-ramp partial cloverleaf interchange immediately to the west of I-97's sweeping curve, which facilitates all movements between the three highways.
I-97 continues north as a six-lane freeway and is closely paralleled on the east by Veterans Highway on the western edge of Severna Park. The highways cross Severn Run within Severn Run Natural Environment Area before they diverge slightly at the Interstate's partial cloverleaf interchange with Benfield Boulevard; access from northbound I-97 to the crossroad is via Veterans Highway. I-97 and Veterans Highway continue to parallel each other to the latter highway's northern end at I-97's partial cloverleaf interchange with the southern end of MD 3 Business (Robert Crain Highway) and New Cut Road. The interchange includes a flyover ramp from northbound I-97 to northbound Veterans Highway just south of its intersection with MD 3 Business. The freeway continues north along the west side of Glen Burnie and meets MD 174 (Quarterfield Road) at a four-ramp partial cloverleaf interchange and MD 100 at a cloverstack interchange that has flyover exit ramps from both directions of I-97.
Interstate 97
With Interstate funding assured, MDSHA commissioned the Baltimore–Annapolis Transportation Corridor Study in 1973 to figure out, among other things, the best route for the Baltimore–Annapolis Interstate. The study discovered a western route following the MD 3 and MD 178 corridors would be less disruptive and require fewer acquisitions of homes and businesses compared to an extension of the Arundel Expressway south along the MD 2 corridor. In June 1979, MDSHA announced plans for I-97. The original route numbering plan, which was approved by the American Association of State Highway and Transportation Officials (AASHTO) at its November 1975 meeting, was for I-97 to include its current route plus US 50 from Parole west to I-95 (Capital Beltway). That proposal included two auxiliary Interstate highways. I-197 would follow US 50 and US 301 east from I-97 to just west of the Severn River. I-297 would follow MD 3 between a pair of intersections with I-97 in Millersville and Bowie. AASHTO rescinded its approval of the 1975 plan at its June 1981 meeting, then approved what was essentially the original 1975 plan at its June 1982 meeting. The east–west segment of I-97 and I-197 was replaced by I-68. I-297 was withdrawn by request of the state of Maryland in 1983. The 1982 concept of I-68 became unsigned I-595 and I-68 was applied to the National Freeway in Western Maryland in 1991 after AASHTO approved the new designations at its June 1989 meeting.