Here is a commercial Traffic Study program called ELEVATE designed by Peters Research in the UK that you can read about or even download a demo if you wish. . . . .Just click on their logo.
The following traffic study is designed to compare, number of lifts, car size and lift speed to enable a basic comparison of differing scenarios for your project. At present I am just using a link to the KONE Elevators Pty Ltd site as this study is quite adequate for this purpose. Just click on their logo to ENTER your DATA