Travellers will need to buy an 'OV-Chipkaart' (Public Transport Chip Card) to use public transport in Rotterdam. It's usable for all bus, tram and metro lines operated by RET. Tourists can also buy an anonymous OV-Chipkaart from ticket machines in all train and metro stations. Arriva and Connexxion buses operate outside the metropolitan area.Taxis are available from taxi ranks or by telephone. The Thai-influenced tuk-tuks operate on a zone system and are a cheaper option.Like most Dutch cities, Rotterdam is very bicycle-friendly, and has separate lanes and traffic lights for cyclists. Bicycles are often the fastest way to travel in Rotterdam, and can be hired near the Central Station.