Realtimerail.nyc is a site that shows realtime subway times, presumably for New York City. It's not an e-commerce site or a service that asks for personal details, so the trust bar is different than for a shop or bank. The domain has been registered since 2017, which counts for a lot: most scam sites don't stick around that long.
The site posts privacy and terms pages, and even a business disclosure. That's more than many hobby projects bother with. What we couldn't verify is a direct contact page, because the site loads its content through JavaScript. If you want to reach out, try the Wayback Machine or look for a contact link after the page renders.
There are no blacklist flags or malware warnings, and the connection is encrypted. If you're asking 'is realtimerail.nyc a scam', the evidence says no. 'Realtimerail.nyc reviews' are sparse, but that's typical for a niche utility. Just keep in mind it's not a major company, so don't expect phone support. As long as you're just checking subway times, it looks fine.