  We present a multilane traffic model based on balance laws, where the
nonlocal source term is used to describe the lane changing rate. The modelling
framework includes the consideration of local and nonlocal flux functions.
Based on a Godunov type numerical scheme, we provide BV estimates and a
discrete entropy inequality. Together with the $L^1$-contractivity property, we
prove existence and uniqueness of weak solutions. Numerical examples show the
nonlocal impact compared to local flux functions and local sources.
