Do you have evidence or stats or sources for these cost/benefit assertions? I feel CRL is extremely expensive for what it will achieve - but I don’t have evidence or stats or sources for saying that.
Yes - the NZTA’s preliminary business case for AWHC indicates a BCR of 0.4.
The CRL is between 1.1 and 2.3 depending on what’s taken into account. I believe the consensus is it’s around 1.6. This is per the business case again (can be found on AT’s website).