The European Route E3 is a part of the international road network known as the E-road network. It stretches approximately 1,500 kilometers, connecting various countries in Europe. The route begins in Norway and travels through Sweden, Denmark, and Germany, ultimately reaching Poland. This route serves as a vital link for transportation and trade, facilitating travel across northern and central Europe. It passes through several major cities, providing access to important economic regions. The E3 is marked by the distinctive green sign with a white "E" and route number, ensuring easy navigation for drivers.