In the U.K. and Ireland, where we directly manage our logistics, we believe we are at the forefront of innovation in our logistics fleet. We collaborate with our transport providers and incorporate a "green" clause in our logistics agreements, which covers both trucking and store delivery vehicles and commits both parties to achieving key environmental goals. Together with our partners, we continually work on new ideas to increase fuel efficiency and reduce costs, thereby minimizing the impact of our vehicles on the environment. In fact, we estimate that we saved over 1.8 million kilometers of truck travel over 2018 by being more efficient.
Through our logistics partners, we work with trailer manufacturers to develop innovative designs for our vehicles. Our fleet is now comprised of newer lifting deck trailers built for T.K. Maxx, which represent the latest in trailer solutions and offer better durability, more cubic space, and aerodynamic profiling, which create less drag. Telematics systems in our trucks along with driver education helps optimize driving habits to reduce fuel costs, improve safety, and ensure efficient routes, which translates to less fuel and fewer emissions. We are also using low-rolling resistance tires on new double deck trailers. In addition to our existing fleet enhancements, we work with our logistics partners to pilot hybrid vehicles, and we continue to leverage technology and design to improve logistics efficiency.
We take steps to increase the utilization of our vehicles and to help manage delivery routes more efficiently. In 2018, we invested in alternative fuel trucks that use liquefied natural gas, giving us a savings of 20% in carbon emissions annually versus a standard diesel powered vehicle. We also continue to utilize dual-fueled vehicles (liquefied petroleum gas and diesel) within our fleet to further reduce our GHG emissions.
We also collaborate with other retailers in the U.K. to share capacity on some of our delivery routes. This collaborative approach can eliminate the need for multiple, parallel trips to the same location, helping to further reduce GHG emissions.
In mainland Europe, we continue to work with our logistics providers to introduce a new double deck trailer for use across other parts of Europe. We are currently trialing two double deck trailers for transport of products between Poland and Germany. These trailers are designed to increase cubic capacity and deliver improved aerodynamics.
Altogether, we estimate that our emissions reductions from our European logistics initiatives was 2,300 metric tons of CO2e.