Below is my plan to renumber some roadways, mostly NJ roadways. First, I would "get rid of" both of NJ's single state US highways (one through decommissioning, and one through an extension). NEW ROAD DESIGNATIONS: I-76: Designation extended via NJ-42, Atlantic City Expressway to Atlantic City. I-176: New number for I-676 from I-76 to US-30 in NJ. I-376: New number for NJ-55 in NJ. US-13: Would remain multiplexed with US-40 (and I-295) up to and across the Delaware Memorial Bridge. Would then run along US-130 to Bridgeport, then along NJ-44 to Delaware Street in Thorofare. US-13 NORTH would then run via Delaware Street, and CR-631 meeting up with current US-130 at the 130/295 split. US-13 SOUTH would multiplex with I-295 from exits 23 to 22, then run along Crown Point Road, meeting up with its northbound routing at Delaware Street. Then, run it along US-130 to it northern terminus at US-1/NJ-171. US-30: Would be taken off the expressway in Philadelphia. From the US-30/I-76 interchange, would continue straight along Girard Avenue to 6th Street (5th Street westbound) to join the current routing at the Ben Franklin Bridge. US-46: Western extension via bridge into PA, brief multiplex with PA-611, then the length of current PA-512. US-46: Eastern extension to Montauk Point, NY. See Kim Russell's ideas for this routing DE-13: Much like 202, the state route would cover the routing of the former US route (thus having a US and DE-13). PA-13: Would cover the route of US-13 with the exception of running along I-76 and US-1 from Girard Avenue to the current US-1/13 multiplex. ALTERNATE PLAN: Historic US-13 signs would be posted along US-13 in PA. NJ-41: Would run via Kings Highway from US-130 to join its current routing in Haddonfield. NJ-42: Would run via Black Horse Pike, Mount Ephraim Avenue, and Haddon Avenue (southbound via Broadway) to the Ben Franklin Bridge. NJ-43: Would run via NJ-47 from Five Points to Brooklawn Circle NJ-45: Would multiplex with US-130, then, run along Broadway up to the Ben Franklin Bridge. NJ-47: Would continue straight along the mainline, covering the NJ-41 routing to Kings Highway in Haddonfield. NJ-49: Would continue north along the mainline to I-295. NJ-141: New number for NJ-154 CR-551: Northern terminus would be truncated to NJ-45 (Gloucester) CR-701: New number for CR-551 between NJ-45 and NJ-47 Alternate PA-13: Would run along existing US-13 from the I-76 interchange to the current US-1/13 multiplex. DECOMMISSIONED OR REVISED ROADS: US-13: US-40/I-295 to DE/PA line would become DE-13 DE/PA line to I-76 interchange would become PA-13 I-76 interchange to US-1 merge would become Alternate PA-13 US-1 merge to northern terminus would become PA-13 US-130 (decommissioned): Southern terminus to NJ-44 would become US-13/NJ-49 NJ-44 to I-295 merge would become NJ-49 I-295 multiplex would be stand alone I-295 I-295 split to northern terminus would become US-13 NJ-41: NJ-41 to Kings Highway would become NJ-47 NJ-42: Freeway portion would become I-76 NJ-44 (decommissioned): Would become US-13 NJ-47: North of Five Points would become NJ-43. NJ-154: Would become NJ-141 NJ-168 (decommissioned): Would become NJ-42 CR-551: NJ-45 multiplex would become stand alone NJ-45 NJ-45 to NJ-47 would become CR-701 NJ-47 multiplex would become stand alone NJ-43 US-130 (excuse of a) multiplex would become stand alone US-13 US-130 to Ben Franklin Bridge would become NJ-45 Spur CR-551: US-130 multiplex would become stand alone US-13 US-130 split to northern terminus would become NJ-41 Gloucester CR-631: NORTHBOUND would become US-13 SOUTHBOUND would be an unnumbered road. I-676 (PA): Would run the entire length of the Vine Street Expressway I-676 (NJ): Would be renumbered I-176 PA-46: Renumber it as PA-512. PA-512: Renumber it as US-46 Net effect of this, 46 and 512 flip flop numbers in PA.