In 1964, the founder's second son, Konrad Auwärter, developed a double-deck design for a service bus as part of his dissertation.
 The 'Do-Bus' design had extremely low weight, and could carry over 100 passengers.
 It also featured a low-frame front axle with forward-mounted steering gear that permitted a low flat floor.
 The double-deck principle was applied to coach design, creating a revolutionary high-capacity comfortable vehicle for touring.
This vehicle was known as the Skyliner, and created an image for the company that differentiated the Neoplan brand from its competitors, and created interest in its products across Europe.

A second manufacturing facility opened in Pilsting in 1973, and a third opening in Kumasi, Ghana, in December 1974 to support a large order.

The double-deck Skyliner concept was taken to its ultimate conclusion in 1975, with the introduction of the Jumbocruiser, a double-deck articulated coach 18 metres (59 ft 1 in) long and 4 metres (13 ft 1 in) high.
 The Spaceliner, introduced in 1979 took the Cityliner concept of passenger floor level above the driver, and extended the actual floor above the cab.
 This kept the height of the vehicle lower than a double-decker, at 3.65 metres (12 ft 0 in), but still allowed installation of toilets, kitchens or sleep cabins below the passenger compartment.

Southern California Rapid Transit District of Los Angeles, operated Neoplan Skyliners during the 1980s and early 1990s.
Antelope Valley Transit Authority operated Skyliners on their Lancaster-Los Angeles route during the late 1990s early 2000s.
In 1964, the founder's second son, Konrad Auwärter, developed a double-deck design for a service bus as part of his dissertation.  The 'Do-Bus' design had extremely low weight, and could carry over 100 passengers.  It also featured a low-frame front axle with forward-mounted steering gear that permitted a low flat floor.  The double-deck principle was applied to coach design, creating a revolutionary high-capacity comfortable vehicle for touring. This vehicle was known as the Skyliner, and created an image for the company that differentiated the Neoplan brand from its competitors, and created interest in its products across Europe.
A second manufacturing facility opened in Pilsting in 1973, and a third opening in Kumasi, Ghana, in December 1974 to support a large order.
The double-deck Skyliner concept was taken to its ultimate conclusion in 1975, with the introduction of the Jumbocruiser, a double-deck articulated coach 18 metres (59 ft 1 in) long and 4 metres (13 ft 1 in) high.  The Spaceliner, introduced in 1979 took the Cityliner concept of passenger floor level above the driver, and extended the actual floor above the cab.  This kept the height of the vehicle lower than a double-decker, at 3.65 metres (12 ft 0 in), but still allowed installation of toilets, kitchens or sleep cabins below the passenger compartment.
Southern California Rapid Transit District of Los Angeles, operated Neoplan Skyliners during the 1980s and early 1990s. Antelope Valley Transit Authority operated Skyliners on their Lancaster-Los Angeles route during the late 1990s early 2000s.
Neoplan Skyliner