Transportation to Kocaeli, which is one of the important points connecting Anatolia and Europe, via the highway is one of the preferred methods. In addition to toll highways, highways such as D-100, D-130, and D-605 are preferred to reach Kocaeli. Kocaeli is an important transit point for transportation from Anatolia to Istanbul and Thrace. Osmangazi Bridge, which makes it possible to cross the Gulf of Izmit between Gebze and Yalova in a short time, has also brought a new breath to road transportation in Kocaeli.