^Thanks for the link to all the photos of the twinning outside of Chase, it’s too bad it’s such a short stretch. Hopefully they continue to 4-lane east of Kamloops on a regular basis to keep extending that section eastward.
As for the 4-laning around Rogers pass, I couldn’t find any info on it but I too have driven through there and seen it happening. Found info regarding expansion around Illecillewaet and Quartz Creek Bridge but nothing specifically about Rogers Pass area.
I did stumble upon this dated (25 years) comprehensive report that I thought was interesting:
http://https://www2.gov.bc.ca/assets/gov/driving-and-transportation/reports-and-reference/reports-and-studies/rocky-mountains/kicking-horse/corridor-management/studies-summary-9610.pdf