BTA Dispatching offers several kinds of cabs:

The maximum amount of passengers in a large van is six adults, two children under the age of twelve is equivalent to one adult.

If you would like to hail a cab, you should do this in a safe place on the side of the road. Do not try to get into a cab while it has stopped at lights. If the cab is vacant it will pull over and pick you up. A cab might not always be able to stop for you because it might be on its way to another job.