my name is bruce agate . this is critical as we are in the process of making decisions for multi-generational transportation infrastructure investment. between the transbay transit center. dtx and others to maximize passenger capacity and operational flexibility. let's call these are foundational principles. uniform platform height boarding levels gives us ability to achieve this principle and this flexibility, allows you to adjust service plans daily, hourly, weekly, et cetera between the two systems to ensure that you get the most value out of both. is it possible? what is best option? i don't know the specific answer. however, as we heard today, there are examples either in north america or other parts of the world where similar issues have been addressed and we need to understand what it takes to get us there. we are pleased -- i was pleased to hear today caltrain and high-speed rail have been meeting and been involved in productive meetings. we also understand the need to move forward in a timely manner