People still remember that in the olden days, when a black Volga drove by, then Hr.Käbin is going to Keila-Joa. And when you spot a yellow Volga, then this is obviously a taxi, so you can boldly gesture with your hand to stop the car. If there is a tiny green light shining in the front corner of the windshield, that means the taxi is available and it can be surely stopped. One must take in account that one who dears to stop the taxi, must have cash. For that reason there is no benefit in waving your students card in the drivers face and to tease the yellow „kitty“ of the great national economy sector.