Here is a nice tray to hold all the Ticket To Ride cards during play so that they don't get spread all over the table.
20180424: Added a new print version 5 with cut-outs for the back row and draw and discard slots to make getting the last card out easier.
20181209: Added a new print version 6 with squared corners for the two card trays. This is for the request made to add strength to help prevent the card tray corners from breaking. I have not had problems with these corners breaking during printing. I print in ABS on a heated build plate with an enclosure to hold the heat in so that layers do not cool too much between each layer deposit. I have had a rounded corner snapped off by the kids smashing the tray as it gets stored on top of the game box between playing sessions. My solution to this is to paint the ABS with acetone. This causes the ABS to melt and flow between the layers better so that it is stronger. It also makes the surfaces smooth.
20190102: See the matching player train tray here: https://www.thingiverse.com/thing:3330055