When evaluating routes, it would be nice to be able to enter a user-defined monetary value per minute (I.e., how much someone values their time in $/min). I'm often presented with a suggested route which costs $20 in tolls but only saves me a few minutes. If I could assign a dollar per minute value, it could automatically propose the most economical route for me based on time and money. This could be improved even further by assigning a cost per km (e.g., user-defined based on fuel consumption, or company reimbursement costs per km) when evaluating routes with different distances.