I created a data model to store railroad systems, services, scheduled, time points, and related information, detailing the schema "Beyond CRUD n' Cruft Data-Modeling" with a few tweaks. The original I'd created for Apache Cassandra, and have since switched to Postgres giving the option of primary and foreign keys, relations, and the related connections for the model.
In this post I'll use that schema to build out infrastructure as a code solution with Terraform, utilizing Postgres and Hasura (OSS).