Harbor Tunnel marks 50th anniversary – The Sun
The Baltimore Harbor Tunnel is approaching its semicentennial. When I was a kid, it was a traffic nightmare, but once the Ft. McHenry Tunnel (I-95) opened in 1985, the Harbor Tunnel became a good alternate route.

Other notes:

• I can’t remember it before it was I-895, but I do remember all the non-MUTCD signs that only got replaced about ten years ago.
• The Harbor Tunnel Thruway had unusual exit numbering schemes — sequential starting after the tunnel headed northbound; mileage-based from the northern terminus southbound)
• There used to be a Colt 45 brewery near the interchange with the Baltimore Beltway (I-695). It later became a Washington Flour facility.
• I also remember the Segram’s 7 advertisement that was on a brick building near the highway
• The speed limit should be at least 55 MPH throughout the non-tunnel sections and maybe 60 MPH in the stretches without exits.
• Steve Anderson has a good history at dcroads.net