Idea of Trolley Icon
There is a flat horizontal line at the bottom. Atop is a small circle near the center but a bit closer to the left end of the line. Above the circle is a long L shaped line titled where the corner of the L is to the right of the circle. Instead of ending directly vertical there is an extra smaller line that hooks off the top towards the left.
This Trolley icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,100 icons, all in the same style and quality.