When, exactly, are you planning on doing this?
June thru Sept average highs are 100F+.
I wish ACA would be more proactive with Interstate riding in western states.
Most western states permit Interstate riding except in urban areas.
California largely does not, but is inconsistent.
In the case of I-40, some entrances have signs banning bicycles, others do not.
Plus, county and state patrol officers probably assume that bikes are generally prohibited.
However -
According to ALL federal highway funding legislation since ISTEA of 1991,
Highway planning and construction
must incorporate all users - including bicyclists.
In the case of I-40, where there is no functional alternative - i.e. Old US 66 bridges out -
then CalTrans must accommodate cyclists on I-40.
I-40 is safe - with wide shoulders and long sight lines.
California could install "Share the Road" signs to conform with federal highway legislation.
If you are stopped and cited, then you have standing to sue.
I have been reluctant to do this, but have asked politely for decades.
With state and national cycling organizational support file suit to withhold federal funding.
Sadly, it's always about money. Money talks.
In federal court, CalTrans would have a hard time justifying their actions.
Two key factors that the Federal Highway Administration considers are safety and cost.
Bicycle use of I-40 is in many respects safer for cyclists and the cost is negligible.
It shouldn't have to be this difficult.
https://www.fhwa.dot.gov/environment/bicycle_pedestrian/publications/multimodal_delivery/?_gl=1*wl55kv*_ga*MjEwMjE0OTY2NC4xNzIxOTY1Mjkx*_ga_VW1SFWJKBB*MTcyMTk2NTI5MC4xLjEuMTcyMTk2NTk3NC4wLjAuMA..