University of Birmingham developing icy road warning system for cyclists

One of the bikes I commute on has clearances that will accept studded tyres. I have studded tyres on there and regular tyres on my single speed. If there's any risk of ice then I ride on the studded tyres. My usual benchmark is 4 degrees and any level of moisture, because 4 degrees at home can mean sub zero temperatures and ice in shady places or away from built up areas. I know some people would laugh at me being that cautious, but having once skidded and come down hard on a frozen rural road I'm not in a hurry to take chances.

Road temperature is not always indicative of ice risk.  Depends on whether or not the road has been salted etc.  I've ridden in -10 centigrade and not had a care in the world as everything was bone dry.  Ice can be very local, e.g. on a bridge or an isolated spot where it's just that little bit colder/more humid than 100 meter down the road.  As soon as temperatures approach zero celsius and it's humid, care should be taken.  The only precaution I take is riding with broader tires, shifting up one gear and going -a lot-  slower.  And riding on the road when it's wet as the cyclepaths over here aren't salted.  I've tried studded tires one winter, years ago when there was not only ice but also snow everywhere.  They worked fine (I could cruise up a hill where cars simply couldn't make it up) but under any other riding conditions they're horrible, I'd only consider them if I had an extra wheelset lying around, which I currently don't.  If it comes to that again then I guess I'll take the bus.

It's the black ice that terrifies me.

When motorists have to scrape windows, the only thing that worries me is when some don't and drive around with even less vision than normal.

What I would describe as hoare frost is not too concerning, the crispy stuff, the light sparkly stuff that makes the crunchy sound, take it a bit easy, especially on corners.

Even iced up puddles, most of the time they crunch a bit, it often takes a bit to fully freeze them.  And they are noticeable.

As I said it's the black ice that has gotten me, the sheet stuff that covers large ammounts of flat normal roads.  Where if you do anything your front wheel just goes and you go down hard.  Unexpected, putting a foot down is no good you are still going down this time in the splits.

That's why I got spike tyres, big chunky ones, for my good Ti xtr'ed bike.  Ceramic brakes too, ali rim brakes can ice up and be proper scarey.  I have yet to experience disks in wet sub zeros.  It's why I'm prepping her at the moment.  Cleaning the drive train in preperation, the Spike Claws are over a decade old, still good.  In snow too.  Keep them boxed, steel bead and very heavy, no good when no snow and ice.

Both the cost and hastle of changing tubeless will probably prevent me from getting a set for my new bike.  Swapping tubed tyres is a relatively easy process.

Black ice is rare though, luckily.  It takes specific circumstances for it to form.  Hope this app can do that.  Just very cold is often not enough.