No longer assigned (decommissioned).

Likely decommissioned with the sweep of routes in the mid fifties. There aren't any old MD 420 signs around anymore to provide decoration for innumerable college dorm rooms. Were this route still on the books, sign replacement may have become an issue, as it did with NJ 69 (changed to NJ 31).

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No longer assigned (decommissioned)

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MD 421, from a 1958 General Drafting map.

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Marked east-west.

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Marked east-west.

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Marked north-south.

Associated Secret-Obscure Routes:
909 793

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Marked north-south.

Once only extended south to the junction of MD 6 at Ironsides. A small piece near the southern MD 6 junction near Nanjemoy was MD 491.

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No longer assigned (decommissioned).

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No longer assigned (decommissioned).

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No longer assigned (decommissioned).

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No longer assigned (decommissioned).

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Unmarked.

Once extended east to MD 201, but now all that remains is this small section, a connector in the US 1/MD 193 interchange, too short to be marked separately.

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Unsigned. Originally designated MD 594E, as part of the Purple Line construction. Renumbered at the request of SHA District 3

Part of the Purple Line right-of-way where it will run through College Park and into adjacent Riverdale Park.

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No longer assigned (decommissioned).

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Unmarked.

MD 432 remains on the books, although the connecting part of Guilford Rd has lost its status as MD 732.

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No longer assigned (decommissioned).

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Unsigned. Originally designated MD 594F, as part of the Purple Line construction. Renumbered at the request of SHA District 3

MD 433 accesses the north side of the New Carrollton Metro station, where the Purple Line will link into the Metro. Opposite the tracks is unsigned MD 950 to access the existing station.

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No longer assigned (decommissioned).

Appeared between 1949 and 1953, and dropped not long after.

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No longer assigned (decommissioned).

Appears on a 1940 state map, gone by 1946.

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No longer assigned (decommissioned).

Just a bunch of neighborhood streets now. The function of this route was largely replaced by MD 193, and MD 201 just past the eastern end is now 6-8 lanes wide.

More info comes from Frank McConnell about Pontiac Street:
I lived on Pontiac Street in the 1960s-1980s. Yes, it used to be part of MD 434, and it's not any more, but it's not gone. The state repaved it, put in curbs and sidewalks (at least on the Pontiac Street portion, not sure about 57th Avenue or Berwyn Road) and gave it to Berwyn Heights to maintain. Berwyn Heights did what it is good at: it erected stop signs. So I suppose you could say it's all still there, they just changed the ownership and signs. Oh, and got rid of the lane markings.

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Marked north-south.

State maintenance begins 0.3 miles north of West St (MD 450), roughly at the spot of an old rail crossing. Turns eastward onto Annapolis St for the last 0.2 miles to MD 450 at the edge of the Naval Academy campus. According to the 1953 state map, 435 once turned left at this point, going northwest on Annapolis St, then turning right, northeast on Severn Avenue to its end. The part of Annapolis St that is part of 435 now was MD 436, and current 436 (Ridgely Ave) was MD 438, named Revell St south of the drawbridge. The small part of Severn Ave between Annapolis St & Ridgely Ave would have been MD 437.

The group of 435-438 are all in or near the neighborhood of West Annapolis. It's more north than west looking on a map, lying northeast of MD 70 (Rowe Blvd) and northwest of MD 435.

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Marked north-south.

Associated Secret-Obscure Routes:
783 784 785 786

Was once numbered MD 438 at some point, and was probably named Revell St. MD 436 features a swing type drawbridge of Weems Creek. Runs just east of the parallel MD 70 (Rowe Blvd). The secret/obscure routes are clustered up near 436's overpass of US 50.

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No longer assigned (decommissioned), entire route now part of MD 435.

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No longer assigned (decommissioned).

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No longer assigned (decommissioned), entire route now MD 436.

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Marked east-west.

Associated Secret-Obscure Routes:
885

MD 439 is only the northernmost part of the 'Old York Road', which carries all or part of three routes. From the southern end of 439, it goes south on current MD 23 for a while before diverting southwest, hitting MD 562 south of Monkton, carrying that number for a short distance before the end of SHA maintenance. It disappears south of MD 145, but once linked with current MD 146 (Jarrettsville Pike/Dulaney Valley Rd) merging again with York Road at the modern-day Towson Circle. There is also a section of Old York Rd inside Baltimore City limits.

MD 439 was a broken route, with a piece up near the northwestern end, from York Road east to an indeterminate point west of Lentz Road, resuming at the Harford/Baltimore County line to MD 23. In 1979, the intervening stretch of unnumbered road was brought into state maintenance.

Baltimore County from early 1950s map, with Old York Rd highlighted in yellow. MD 439 is at top. York Rd at the time was still US 111. The first piece of the pre-Interstate Harrisburg Expressway also appears.

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