It's a logo of a cable car travelling along the cable. The car has two windows on it with a line connecting up to the cable and two wheels on top of the top cable. The main cable is slightly diagonal from left going up to the right.
This is a Cable Car icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,700 icons, all in the same style and quality.