RN20:*GIS shows that national maintenance continues southwest and northwest to Juan Antonio Lavalleja or the pier, depending on which dataset.
km 1 is approximately 1 km from the pier, and there is no obvious on-the-ground change at JAL. So the beginning should read as follows:
ParEstFar
http://www.openstreetmap.org/?lat=-32.979670&lon=-58.063216+X767311
http://www.openstreetmap.org/?lat=-32.987536&lon=-58.052166Uru
http://www.openstreetmap.org/?lat=-32.983140&lon=-58.046420*+X05 -> PueSau
*Gre ->
PueGre*ToRN5 -> RepBay (how it's marked on 5; of course this is a nationally maintained piece of 4 so I think it's probably signed as such)
*RN25 doesn't seem to be signed at 20, and GIS shows a different route that doesn't reach 20, so change to EstFra (
as signed farther east)?
RN21:*AveJulCes ->
AvdaGonMor*what's the importance of ArmSom?
*add ParAnc
http://www.openstreetmap.org/?lat=-34.278248&lon=-57.871878 (a nationally maintained branch)
*CarCon -> Con (street name not signed)
*JuanSanMar -> Cal (street name not signed)
*add SanRoq
http://www.openstreetmap.org/?lat=-34.082024&lon=-58.112354 to eliminate a visible distance "error"
*move Def north one block to Sol, signed as a
truck route*GIS shows a two-block jog on Paraguay in northern Carmelo for locally maintained 21. Signs show northbound traffic turning
left on Ansina and
right on Italia. There is a similar sign at Paraguay but none for the right turn from Paraguay. Southbound traffic has no signs for the turns shown on OSM, but Google's route is
signed. Here's how I'd show the route:
12Feb
http://www.openstreetmap.org/?lat=-34.003337&lon=-58.286086Sol
http://www.openstreetmap.org/?lat=-34.001754&lon=-58.285711Ans
http://www.openstreetmap.org/?lat=-33.989452&lon=-58.282900*add CEduIra
http://www.openstreetmap.org/?lat=-33.980494&lon=-58.290807 at the other end of the truck bypass and +X571192
http://www.openstreetmap.org/?lat=-33.958454&lon=-58.319035 for shaping
*RioUru has no signed name and is not necessary for spacing
*ConMin -> PunGor (street name not signed)
*Nueva Palmira has a new bypass, almost certainly signed as 21. Replace RN12_W and Chi_S with:
RN12_W
http://www.openstreetmap.org/?lat=-33.884258&lon=-58.384888NuePal_N
http://www.openstreetmap.org/?lat=-33.852081&lon=-58.387463*add PlaAgr
http://www.openstreetmap.org/?lat=-33.807412&lon=-58.364375 (a nationally maintained branch)
*replace +X06 with Con
http://www.openstreetmap.org/?lat=-33.626019&lon=-58.327188*the bypass of Dolores is locally maintained and not signed as 21 at either end, merely as a truck route. There are
signs downtown. The only difference from what GIS shows as the locally maintained route northbound is that signs use Dr. Victor Bertullo instead of Manuel Oribe. Southbound signage agrees with GIS, using General Fructuoso Rivera. So here's how I'd handle Dolores:
PerManBla_S
http://www.openstreetmap.org/?lat=-33.541705&lon=-58.229991GenFruRiv
http://www.openstreetmap.org/?lat=-33.534312&lon=-58.222207RN96_S
http://www.openstreetmap.org/?lat=-33.531342&lon=-58.216209DrVicBer
http://www.openstreetmap.org/?lat=-33.528356&lon=-58.210244EleBar
http://www.openstreetmap.org/?lat=-33.523168&lon=-58.208935PerManBla_N
http://www.openstreetmap.org/?lat=-33.518159&lon=-58.204247*GIS shows locally maintained 21 through Mercedes on 28 de Febrero and Wilson Ferreira Aldunate, but this isn't signed. There are
signs for 2 at Garibaldi and just
local destinations at Avenida Fregeiro. I'd probably cut the end back two blocks to the last sign with non-local destinations. Or
here where pavement changes.
RN22:*reverse the direction to match km posts?
*I cannot find any signs for 50 in Tarariras. GIS shows locally maintained 50 south on Calle Rincón, and no 50 north of town. But 50
is signed at 54. So keep RN50_N but move RN50_S to RN50_S
http://www.openstreetmap.org/?lat=-34.265920&lon=-57.608233*RN106 -> Mig? I cannot find any signs for (locally maintained) 106 south of 54
RN23:*Gon ->
EstGon; move south to the bus stop between Rivera and Comercio?
*ConCalD -> MalAbr and move barely north one block to where the bus stop is
*replace +X02 with +X197913
http://www.openstreetmap.org/?lat=-34.099297&lon=-57.007198 and PasoRey
http://www.openstreetmap.org/?lat=-34.067716&lon=-57.028034RN24:*add ToRN2
http://www.openstreetmap.org/?lat=-33.122349&lon=-58.103385 (not signed but it's a nationally maintained branch of 2)
*remove NueBer; traffic to Nuevo Berlin is signed via RN20_W
*replace +X02 with Aba
http://www.openstreetmap.org/?lat=-32.880822&lon=-57.972869*TresQui -> SanJav_S (it's a nationally maintained branch of 24 to San Javier), SanJav -> SanJav_N
RN25:*replace +X05 with Men
http://www.openstreetmap.org/?lat=-32.561282&lon=-57.482164*Ave19Jul -> Alg (street name not signed here)
*I cannot find any 25 shields on the locally maintained portion east of Guichón. So unless I'm missing something, RN90_W -> RN90 and delete the rest.