Mass route update will involve checking check boxes for the routes you are to update, typing the percentage you want to change it by, selecting whether that is up or down and pressing update. You then review the proposed changes and edit it (for the whole group) as required and finally finish the changes. I worked on initial GUI (Graphical User Interface) but it still remains Will's project. He has recently graduated and has copious amounts of alcohol to consume. He should be back in the near future.