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Road511 vs Transport for London, England

Same instrument, two spec sheets — measured, not claimed.

APIRoad511DEAD0Transport for London, EnglandHEALTHY77
Uptime · 30d
Uptime · 90d27.5%68.6%
Uptime · 30d0.0%46.7%
P50 · ms1128316
P95 · ms2458732
AuthapiKeyapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — API key may be required for production
Rate limit70 req/window · 69 remaining · resets 1783522019Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Road511 vs Transport for London, England: common questions

Which is more reliable, Road511 or Transport for London, England?

On our scheduled checks, Transport for London, England leads on measured uptime — Road511 at 27.5% versus Transport for London, England at 68.6% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, Road511 or Transport for London, England?

Transport for London, England has the lower median latency in our checks — Road511 responds in 1128 ms versus Transport for London, England at 316 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do Road511 and Transport for London, England need an API key?

Both ask you to authenticate — Road511 uses an API key and Transport for London, England uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call Road511 and Transport for London, England from the browser?

Yes — both Road511 and Transport for London, England send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Road511 and Transport for London, England free for commercial use?

Road511 has unclear commercial terms, and Transport for London, England has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.