1. I'm talking about northbound which is bypassed by `=primary` Hill Rd Flyover. Seems a close comparison.  
2. You keep discussing CPBR only, but is it really comparable? For reference only, the bypassed CWBR is officially a District Distributor, and actually has an AADT of a similar magnitude with NCWBR between Lee On Rd and Shun Lee Tsuen Rd, higher than the latter and Sau Mau Ping Rd. https://atc.td.gov.hk/aadt/3019 https://atc.td.gov.hk/pdf/2018/S3019.pdf
3. I'm only saying they should be considered a set of related junctions, only split up into different intersections and traffic lights from the terrain constraint. So this shouldn't be penalized. 
4. As I said, I'm mostly asking about light vehicles, and only downhill for heavy vehicles.  
5. If it does "support cross-district traffic", why shouldn't it be `=secondary` ? 
6. It's significant and important on a district level. I don't see how it's absolutely "inaccurate". 