Depends on the distance between the house and the main road.

Is your house the one on the right? It looks pretty close to the other home...are you free to plant where the strip of grass is? Maybe something that could be kept trimmed into a tall, narrow hedge...Podocarpus, Carolina Cherry Laurel, Ficus Nitida. We used to have a long, tall hedge along the driveway at our previous home...Orange Jessamine...lush green and fragrant. We liked them so much we've planted them along a section of driveway at our new home. For years I called it Orange Jasmine, but it's "Jessamine." You can trim it into a tight hedge, or let it grow out a bit and enjoy the white, fragrant blooms.

This is the Orange Jessamine hedge...second photo shows the white blooms.

Those driveways are really close. You can put a metal fence just to break up the look. It will still be see through but it will help separate both properties. You can also place pillars with lights in them every 8 to 16 feet.

In this link scroll down until you see the row of trees...that's my idea http://www.thisgrandmothersgarden.com/2010/09/sunbeams-kissing-air.html

Thanks guys