  This note describes a technical overview of UXsim, an open source
macro/mesoscopic traffic simulator in pure Python programming language. UXsim
is based on Kinematic Wave model (more specifically, mesoscopic version of
Newell's simplified car-following model) and dynamic user optimum-like route
choice principle, which are well established methodology in the transportation
research field. It can compute dynamical network traffic flow and have basic
visualization and analysis capability. Furthermore, users can implement their
own models and control methods into the simulator by using Python, thanks to
the flexibility of the language. The simulator and its codes are freely
available at https://github.com/toruseo/UXsim under the MIT license.
