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sean p. may
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MBTA Leave-By Planner commute view

MBTA Leave Now

Updated Jan 2026

Git Repo(opens in new tab)
JavaSpring BootGradleHTML

this is a spring boot project that answers a pretty simple commuter question: when should i leave? it has both a generic stop-level API and a more opinionated leave-by planner for my fixed commute. i mostly built it to get comfortable with spring and gradle.

MBTA prediction-driven leave-now API

fixed commute leave-by planner with transfer and walking buffers

spring boot + gradle kotlin DSL practice project

what i built

  • spring MVC endpoints for stop-level leave guidance and a fixed commute planner
  • MBTA API client using java HttpClient and jackson parsing
  • minimal browser UI for entering a deadline and viewing leave-by guidance

how it works

  1. 1fetch upcoming MBTA predictions and schedules for the relevant stops
  2. 2apply walk-time and transfer buffers to compute a leave-by recommendation
  3. 3expose results through a REST API and a lightweight static frontend

results

  • ✓solid practice project for gradle kotlin DSL, spring MVC, and test structure
  • ✓bridges backend API logic and a usable frontend in one small repo

what's next

  • generalize the fixed commute planner into configurable routes
  • add example responses and screenshots for easier onboarding