a third of membership. On average, Citi Bike trips wholly within Midtown Manhattan are at least faster, 2–3 minutes shorter, and $6 cheaper than a taxi between the same two points, with most taxi trips in that area being less than long. For trips between long, average Citi Bike trips are at least 5 minutes faster and $11.75 cheaper as opposed to the comparable taxi trip. A software developer at Genius extrapolated that from July 2016 to June 2017, forty percent of all taxi trips taken within neighborhoods served by Citi Bike were slower than the same trip via bike. Over half of all Citi Bike trips occur during rush hours . However, in 2015, there were at least 10 times as many taxi trips as Citi Bike trips in Midtown during rush hour. The NYCDOT publishes a list of Citi Bike usage statistics on its website. In Citi Bike's first three years of operations, no one died while riding a Citi Bike. This was partly attributed to the bikes' design, as well as the higher concentration of cyclists on New York City roads before and since Citi Bike's launch. The first death involving a Citi Bike occurred four years after the service's launch, in June 2017, when a cyclist in Chelsea was struck by a bus. Bikes The bicycles are utility bicycles; they have a unisex step-through frame with an upright seating position. They weigh about each. Their one-piece aluminum frame and handlebars conceal cables and fasteners in an effort to protect them from vandalism and bad weather; the handlebars are located above the seat, allowing riders to sit upright and thereby maintain balance. They are equipped with Shimano Nexus three-speed, grip-shifter-operated internally-geared hubs, full mudguards/fenders and chain guard. The heavy-duty tires are puncture-resistant and filled with nitrogen to maintain proper inflation pressure longer. The tires are also wider, leading to increased stability. Twin LED rear lights of a pre-2015 design are integrated into the frame; the frame's bright-blue color increases the bikes' visibility. The bikes are built in Saguenay, Quebec, by Cycles Devinci. Citi Bikes are slower than most utility bicycles, averaging only as opposed to regular bicycles' average speed of , which increases safety due to a lowered risk of a high-speed collision. The bikes are assembled in Detroit. In 2015, Ben Serotta helped redesign the bicycle to include a new seat, a simpler gear shifting mechanism,