In the end of 2017, Federal Administrative Court in Leipzig (Germany) allowed cities and communes in Germany to impose bans for diesel cars in order to reduce the level of nitric oxide in the air. This decision radically changed and car market in the Germany, EU, both set a new challenge for transportation sector. As results in the EU, in legislative level, from 2035 is prohibited to trade with a new diesel car. Set of countries, cities such as Paris (France), Madrid (Spain), Athens (Greece), Warsaw (Poland) significantly limited use of an old or/and diesel cars. In this way Latvia shows a lag in the scientific and practical aspects of solving the problem. The research goal is to underline necessity to development of sustainable solution for transportation in Latvia, as well as to show possible solutions to the problem. The study is based on a statistical analysis of the use of freight transport in Latvia and the EU. Mathematical models being developed show the impact of decisions made on the economy and environment in Latvia.