Here's an example for [from London to Dublin].
Click the big arrow icon to see the driving directions right on the Google search results page:
You can open Google Maps by clicking the map thumbnail. This way, you can find alternate routes, walking directions, transit directions and more.
"These directions are for planning purposes only. You may find that construction projects, traffic, weather, or other events may cause conditions to differ from the map results, and you should plan your route accordingly. You must obey all signs or notices regarding your route," informs Google.
This feature is also useful to find the distance between two places, as well as the driving time in current traffic.