This document discusses disruptive innovation in the transport sector and how it could help address budget constraints. The author argues that while disruptive innovation has led to dramatic improvements in the private sector, there are few examples of it in public transport systems which are primarily managed by the government. The keys to enabling disruptive innovation include carefully defining outcomes, piloting new concepts, establishing an autonomous innovation unit, focusing on specific market segments, aligning stakeholders, demonstrating results from pilots, and identifying next steps for scaling successes. An example of a potentially disruptive innovation is a smartphone-based parking payment system that allows prices to vary based on demand.