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I am exploring caching options for the Google Roads API, particularly regarding how to handle speed limits and location data. Based on the documentation, I understand that speed limits can only be cached for up to 30 days. However, Place IDs can be stored indefinitely. I am trying to figure out the policies regarding the relationship between raw location data, snapped points, and Place IDs.

Here are the specific scenarios I'm considering for indefinite caching:

  1. Mapping raw location points to Place IDs.
  2. Mapping snapped points to Place IDs.

Are either of these scenarios allowed to be cached indefinitely? My reasoning is that Place IDs alone are not very useful unless they are associated with specific location points. If neither scenario is allowed, what would be the recommended approach to caching this type of data and/or reducing the API load for a system with a huge number of active vehicles?

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