This document discusses how public transportation agencies can use big data to improve performance. It provides examples of how transportation agencies can use automated vehicle location (AVL) data from buses to identify excess waiting times, busy routes, and bottlenecks. This data can then be used to optimize schedules and reduce excess waiting times. The document also discusses how AVL data combined with automatic passenger counter (APC) data can be used to analyze bus load profiles and driving patterns to find opportunities for fuel savings and safety improvements. Finally, the document presents a vision of integrating various data sources like video, sensors and customer apps to further optimize public transportation systems.