text: Processor Capability Timeline: This chart shows a 2012 projection of the percentage of controller deployments from 2011 through 2020 that was developed as a part of the previous version of this course. In 2011, there were just over 300,000 signal controllers in the US and roughly 200,000 of these were in need of replacement to support connected vehicle applications (i.e., legacy controllers) while 100,000 of the controllers were technologically ready. The three lines (total, in need of replacement, and technologically-ready) continue across in a mostly linear fashion until 2018 when there are a total of roughly 340,000 controllers, all of which are shown as technologically-ready. The table is supplemented by text indicating that, at least in Minnesota, in 2019, that this projection has been largely validated as there are only 5% of legacy controllers remaining.