Quietest highway route in each state

<img width=“750” height=“383” src=“https://i2.wp.com/flowingdata.com/wp-content/uploads/2019/11/Quietest-routes.png?fit=750%2C383&ssl=1" class=“attachment-medium size-medium wp-post-image” alt=“” srcset=“https://i2.wp.com/flowingdata.com/wp-content/uploads/2019/11/Quietest-routes.png?w=2022&ssl=1 2022w, https://i2.wp.com/flowingdata.com/wp-content/uploads/2019/11/Quietest-routes.png?resize=210%2C107&ssl=1 210w, https://i2.wp.com/flowingdata.com/wp-content/uploads/2019/11/Quietest-routes.png?resize=750%2C383&ssl=1 …