https://new.mta.info/privacy-policy

As a transit provider, they seem to be offering the option to report detailed location data for a “smart alerts” feature provided by subcontract to a third party. My walking speed is relevant to predictive alerting for transit, given the non-uniform distribution of US transit, so it makes sense that personalized fitness data is a thing. (I don’t approve of doing so server-side — that particular function should be device-local.) I also assume, unverified as I’m not in their city, that their transit improvement option may also use it. (See below.)

They explicitly do not use your data for marketing. It’s a clearly written policy with full declarations in most respects. However —

App authors, please update your privacy policy to explicitly describe how and which fitness data is collected and used? I’m having to make inferences and that’s understandable but will need to be corrected.