Should HS2 carry adjacent cycle track?

Looks like it's a no
https://www.theguardian.com/environment/bike-blog/2019/feb/01/scrapped-hs2-bike-path-could-have-reaped-five-times-more-than-hs2-itself

A scrapped “emerald necklace” cycleway up the spine of the country alongside HS2 would have delivered a return on investment of up to five times greater than the rail project itself, an FoI request has revealed – but neither the government nor HS2 Ltd will fund it.

A 50-page report outlining the business case for the national cycleway, obtained by the Guardian, reveals health, congestion and economic benefits of between £3 and £8 per £1 spent. The return on investment of HS2 itself, meanwhile, is just £1.5-£1.7 per £1, according to the National Audit Office.

sigh