Back Brihanmumbai Electric Supply and Transport German Brihanmumbai Electric Supply and Transport Spanish बृहन्मुंबई विद्युत आपूर्ति एवं यातायात Hindi ಬಿ. ಇ. ಎಸ್. ಟಿ, ಮುಂಬೈ Kannada ബൃഹന്മുംബൈ ഇലക്ട്രിക് സപ്ലൈ ആൻഡ് ട്രാൻസ്പോർട്ട് Malayalam बृहन्मुंबई विद्युतपुरवठा आणि परिवहन उपक्रम Marathi बृहन्मुम्बै विद्युतापूर्तिः एवं परिवहनसंस्था(बेस्ट्) Sanskrit Brihanmumbai Electric Supply and Transport SIMPLE
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 Electric House, Colaba, headquarters of BEST | |
| Formerly | 1873 as Bombay Tramway Company Limited (horsecar) ---- 1905 as Bombay Electric Supply & Tramways Company Limited (BEST) (tramways and electricity) ---- 1947 as Bombay Electric Supply and Transport (BEST) (transport and electricity) ---- 1995 as Brihanmumbai Electric Supply & Transport (BEST) (transport and electricity) |
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| Company type | Autonomous state-owned enterprise |
| Industry | Public transport – Tram (1873–1964), Trolleybus (1962–1971), Bus (1926–present) ---- Electricity (1905–present) |
| Founded | Mumbai (1873) |
| Headquarters | Electric House, Colaba, Mumbai, Maharashtra, India |
Key people | Anil Diggikar (general manager) Ashish Chemburkar (chairman) |
| Revenue |  ₹ 2,353.4 million ($538.7m USD) (2004) |
 ₹620.4 million. ($14.2m USD) (2004) | |
Number of employees | 44,000 (2005) |
| Parent | Municipal Corporation of Greater Mumbai |
| Website | bestundertaking |
The Brihanmumbai Electricity Supply and Transport Undertaking (BEST) is an Indian civic transport and electricity provider public body based in Mumbai, Maharashtra. It was originally set up in 1873 as a tramway company called Bombay Tramway Company Limited. The enterprise set up a captive thermal power station at Wadi Bunder in 1905 to generate electricity for its trams, which positioned it to also supply electricity to the city. It then re-branded to Bombay Electric Supply & Tramways Company (BEST). In 1926, BEST began operating motor buses. In 1947, the company became an undertaking of the municipal corporation and rebranded itself to Bombay Electric Supply & Transport. In 1995, it was renamed Brihanmumbai Electric Supply & Transport. It now operates as an autonomous body under the municipal corporation.
BEST operates one of India's largest bus fleets. Its service covers the entire city and also extends into neighbouring urban areas. In addition to buses, it also operates a ferry service in the northern reaches of Mumbai. The electricity division of the organisation is also one of the few electricity departments in India to garner an annual gross profit.