MB350:OSM has a branch east of 54N at Lavenham which must be wrong. However, this road might get a wp ?
MB351:CampHugRd is also RD 91 W
DaneDr is also RD 90 W
MB352:LanAve is only signed 87 N
MB353:CorRd is also signed RD 98 W
MB354:Extends at south end on OSM and GM but 2014 GSV shows a ENDS sign
OSM indicates it not being concurrent to MB16 but 2018 GSV confirms that we are right
End -> 130 W ?
80N is road 469 on OSM
MB359:Extends at east end on OSM, GSV is incomplete. No evidence for end (but surely by your official source)
MB16 -> MB16/83
MB360:82W is also road 360 on OSM
MB361:Extends at west end on OSM, no ENDS sign but a EAST sign. GSV ends here.
No junction at BellLakePP according to OSM and September 2019 GSB (Google Snow Bike). It's also not a wp in use.
MB366:MB485 is off
MB367:IceCreRd -> IceCrkRd ?
SL10-44 is off
MB373:I'd move NorHouFry to the end of the landing stage, see ferry location for MB373nor
MB373nor:*OldMB373_D is off
*OldMB373_I is off
PauRd is off
MB374:*OldMB374_A is off
*OldMB374_E is off
*OldMB374_E -> OldMB374_E ?
MB375:Extends at east end on OSM and GM, no GSV available
MB384:+X799771 is off
+X929289 is off
+X473527 is off
+X208110 is off
+X124263 is off
MB391:Life is a highway
MB392:+X963257 is off
AndBay is off
+X351645 is off
MB395:SK/MB is off
Some hidden wps are off
MB398 is off
MB395:Extends at west end on OSM and GM, no GSV available
MB399:Extends at east end to the north on OSM, no GSV available
Extends at east end to the south on GM, no GSV available