[eternallyme]

With those traffic counts, the 104 should definitely be twinned up to (and including) the Canso Causeway ASAP, along with the 103 gap to Bridgewater and the 101 to Berwick.

The 102 should be 6 lanes at least to Exit 7.

Twinning should be considered when the AADT is close to 10,000 (i.e. within or shortly after the construction timeframe), although that can be higher on commuter routes (i.e. 107, 118) and lower on core national routes with high truck traffic volumes (i.e. 102, 104). The 104 should have a lower traffic tolerance before twinning being the Trans-Canada Highway.