You may rent a car to get around Turkey from an international or local car rental agent. If you are traveling by plane you may find car rental desks in arrival terminals of all airports such as IST Ataturk Airport, Istanbul.
It is illegal to use a mobile phone while driving. Maximum permitted amount of alcohol in blood for drivers is 0.05 grams per litre (g/1000 mL), that is roughly equal to two cups (a cup=500 ml) of beer or two glasses (a wine glass=330 ml) of wine. The use of seat belts both at the front and back line is obligatory.
Turkish signboards are almost identical to the ones used in Europe, with very insignificant differences. The place names written on green background lead to motorways (which you should pay a toll, unless it is a ring road around or within a city); on blue background means other highways; on white background means rural roads (or a road inside a city under the responsibility of city councils); and on brown background indicates the road leads to a historical place, an antique city, a place of tourist interest or a city out of Turkey (these signboards used to be on yellow background till a few years ago, so still there is a chance of un-replaced yellow signboards existing here and there). Also keep in mind that these signboards are not always standardized; for instance, some of the blue ones may be leading into the rural roads.
As Turkey uses the metric system, all distances on the signboards are in kilometers, unless otherwise stated (such as meters, but never in miles). See car rentals http://turkiyerehberi.gen.tr/index.php?cat=14&subcat=119 for more details car rental view web site ftrom here: www.bilsentravel.com