Whenever you want to have more space on your screen for the map, you can collapse the list of vehicles/places. Simply click on the arrow at the bottom of the list, to minimize the list:
Click the arrow button at the bottom of the list:
Remember that if you still feel you need more space for the map, you can change your browser to full-screen view. This is usually done by pressing the F11 key. To come back to normal view, click again the F11 key or the ESC key.