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The dynamics on the whole network is determined by selecting a solution to the Riemann Problems at junctions, i.e., the Cauchy problems with constant initial data on each incident road. The latter are solved by assuming the maximization of the flow and assigning a traffic distribution coefficient for outgoing roads of diverges, and a priority rule for incoming roads of merges. A general emission model is considered and its parameters are tuned to the $ {\\mathrm{NO_{x}}} $ emission rate. The minimization of emissions is then formulated in terms of the traffic distribution and priority parameters, taking into account travel times. A comparison is provided between roundabouts with optimized parameters and traffic lights, which correspond to time-varying traffic priorities. Our approach can be adapted to manage traffic in complex networks in order to reduce emissions while keeping travel time at acceptable levels.&lt;\/p&gt;&lt;\/abstract&gt;<\/jats:p>","DOI":"10.3934\/nhm.2023030","type":"journal-article","created":{"date-parts":[[2023,2,27]],"date-time":"2023-02-27T04:32:27Z","timestamp":1677472347000},"page":"694-722","source":"Crossref","is-referenced-by-count":2,"title":["Emissions minimization on road networks via Generic Second Order Models"],"prefix":"10.3934","volume":"18","author":[{"given":"Caterina","family":"Balzotti","sequence":"first","affiliation":[{"name":"SISSA Scuola Internazionale Superiore di Studi Avanzati, Trieste, Italy"}]},{"given":"Maya","family":"Briani","sequence":"additional","affiliation":[{"name":"Istituto per le Applicazioni del Calcolo, Consiglio Nazionale delle Ricerche, Rome, Italy"}]},{"given":"Benedetto","family":"Piccoli","sequence":"additional","affiliation":[{"name":"Department of Mathematical Sciences, Rutgers University, Camden, USA"}]}],"member":"2321","reference":[{"key":"key-10.3934\/nhm.2023030-1","doi-asserted-by":"publisher","unstructured":"L. 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