Fig. 5

Projection coefficients on the traffic emissions basis from LHS performed directly on \([\alpha ^{lin} _{min}, \alpha ^{lin} _{max}]^{N_{lin}}\) (blue) compared to the projection coefficients of traffic emissions model outputs \(E({\mathbf {p}}_{traffic} , \mathbf{p}_e)\) (red) over a training ensemble of parameters \((\mathbf{p}^i_{traffic} , {\mathbf {p}}^i_e)\) selected by LHS. Left: the parameter space of \((\alpha ^{lin} _1,\alpha ^{lin} _2)\). Right: the parameter space of \((\alpha ^{lin} _1,\alpha ^{lin} _4)\)