Note that “Trans-Canada Highway” appears on route markers(instead of guide sign) for network identification purposes only. This does not meaning name of PTH 100. (PTH 16 also have same marker with only different nunber but not named as trans canada as well) Similar to U.S. Interstate shields do have 'INTERSTATE', the logo denotes system membership, not the name of the highway, we don't add name of any interstate highway as 'interstate'. If you happen to see any sign that actually names the road itself as “Trans-Canada Highway,” I’d appreciate it if you could share the exact location.