"commercial" route?

[NE2]

http://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~212212~5500290:Shell-Map-of-Metropolitan-Baltimore?sort=Pub_List_No_InitialSort%2CPub_Date%2CPub_List_No%2CSeries_No / http://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~212214~5500291:Annapolis--Downtown-Baltimore--Sigh?sort=Pub_List_No_InitialSort%2CPub_Date%2CPub_List_No%2CSeries_No shows "COMM" US 40 on what's now US 40 Truck (and several other such routes).

[US71]

http://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~212212~5500290:Shell-Map-of-Metropolitan-Baltimore?sort=Pub_List_No_InitialSort%2CPub_Date%2CPub_List_No%2CSeries_No / http://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~212214~5500291:Annapolis--Downtown-Baltimore--Sigh?sort=Pub_List_No_InitialSort%2CPub_Date%2CPub_List_No%2CSeries_No shows "COMM" US 40 on what's now US 40 Truck (and several other such routes).

Sends me down Route 503

[NE2]

Sends me down Route 503

Sometimes temporarily unavailable is just temporarily unavailable.