Elaboration : Infrastructure refers to the transport and communication networks , electrical frameworks and sanitation systems . Services refer to a particular type of work or help provided by a business to customers . Airport expansion and development are part of infrastructure heavily invested by governments to ensure the air passenger traffic flow more efficiently . Many countries in Southeast Asia such as Singapore,Malaysia and Thailand have expanded or continue to expand their airports considerably to support the rapid growth in international tourist arrivals in the past three decades . The availability of accomodation is an important factor which supports the growth of tourist arrivals . There must be enough hotels with various room rates , such as five star hotels , backpacker hostels or homestays , to cater to the rising number of tourists with different budget .Important services in tourist sites to support tourism growth include food outlets , entertainment and telecommunication links . Today , telecommunication links such as free wifi in hotel rooms and lobbies are expected to be offered in hotels . Many countries also offer tertiary and diploma courses on tourism , hotel management and catering to improve the service quality as trained personnel working in the tourist industry , such as hotel managers , drivers , guides , porters and travel agents , can leave a good impression on tourists and indirectly help to improve tourist sites .