Drawing depicts small, round-edged rails embedded in the ground on either side of a crosswalk for tactile feedback at road crossings.

The fact that you posted a picture and didn't describe it for blind people speaks volumes. Pay attention next time. Anyways, making crosswalks more tactile with paint would be a great idea. Using rails made out of something that wouldn't wear tires too much and would be long lasting could work, though would need a lot of replacement.

We don’t need these railings. Blind people have mobility training to cross the road, there are also apps like soundscape to help with this.

Blind people actually learn to rely on their hearing so much that they can hear when its safe to cross a road, crosswalk or not. So while this is a lovely idea, it might not be necessary as blind people don't exactly need to know how wide the crosswalk is, just that they are walking in the street which can already be detected by a white cane feeling those funny bumps you always see on sidewalk cut outs.

Those wouldn't work in northern climates with lots of snow (Canada, Northern US, etc). The plows on the street would catch on them and either damage the plows, or more likely, damage the rails.

Most people are trained to listen to the sound of traffic and to go parallel with the traffic.

In theory these aren't awful, if I'm understanding the idea properly, but in practice, we don't even have sidewalks or crosswalks everywhere we need them, corner cut outs, the raised bumps with the fancy name I forget, etc. With an audible crosswalk signal and the proper accommodations that we're already supposed to have, these wouldn't be necessary.

This is a good idea, but sidewalks where I live are so cracked and not kept that I usually just take cars and stuff everywhere.

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