In most cases, high-speed rail travel is time- and cost-competitive with air travel when distances do not exceed 500 to 600 km (310 to 370 mi), as airport check-in and boarding procedures may add as many as two hours to the actual transit time.  Also, rail operating costs over these distances may be lower when the amount of fuel consumed by an airliner during takeoff and climbout is considered. As travel distance increases, the latter consideration becomes less of the total cost of operating an airliner and air travel becomes more cost-competitive.
Tren Griffin works at Microsoft. He writes the blog and is active on Twitter (@TrenGriffin). He was formerly a partner at Eagle River, a private equity firm controlled by Craig McCaw with investments in telecommunications and startups. From 1999 to 2001 he was vice president of strategy at XO 1994, Griffin was the fourth person to join Teledesic, a global broadband satellite communications startup, which raised over a billion dollars at a valuation of more than $3 billion. Griffin previously worked as a consultant in Australia and Korea. He is the author of six other books, including Charlie Munger: The Complete Investor (Columbia, 2015).
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