Paid/unpaid roads together

When planning a long day trip, I want to use toll roads for part of the route and toll-free roads for the rest. I could achieve this by splitting the plan into two parts, but that wouldn't allow me to plan the overall charging time, and things would get messy. It would be great if, on the screen where we available to enter the charging percentage for each stop, an option to use toll roads as long as no changes were made after that point.