The race to the 2016 presidential primary is heating up, but on a state level, Colorado voters have a pressing political deadline. On Tuesday, an estimated 40 percent of Colorado’s registered voters will head to the polls, according to Jerome Lovato, voting systems specialist for the state of Colorado. But this year, voters will also have a hand in deciding the future of Colorado’s elections by helping test new voting machines. The upcoming elections are a trial period for four different vote-counting machines, each of which will be tested in both a large Front Range county, as well as a smaller rural county. The test counties include Adams, Denver, Douglas, Garfield, Gilpin, Jefferson, Mesa, and Teller. Secretary of State Wayne Williams plans to authorize one of these machines for use in future elections statewide, starting in 2016. The winning machine will be chosen for its security, usability, accuracy, and user feedback, among other criteria, according to Lovato. By streamlining Colorado votes on one system, the department hopes to start moving away from the current, outdated mix of direct-record electronic voting machines—a process that’s long overdue. So what do you need to know about our current (and upcoming) voting systems before heading to the polls? Read on to find out why Colorado’s antiquated voting system is in desperate need of an upgrade.