Central stops between both lanes will be placed at locations with limited space at the right side. This requires vehicle to have doors on both sides. On 3 November 2005, a licence and technology transfer agreement was signed between Advanced Public Transport Systems (APTS) and the Korea Railroad Research Institute (KRRI). KRRI was to develop the Korean version of Phileas vehicle by May 2011. Since June 2013, 3 miles (1.5 miles each way) of the Emerald Express (EmX) BRT in Eugene, Oregon has used magnetic guidance in revenue service on an especially curvy section of the route that also entails small radius S-curves required for docking. The driver controls braking and acceleration. On kerb-guided buses (KGB) small guide wheels attached to the bus engage vertical kerbs on either side of the guideway. These guide wheels push the steering mechanism of the bus, keeping it centralised on the track. Away from the guideway, the bus is steered in the normal way. The start of the guideway is funnelled from a wide track to guideway width. This system permits high-speed operation on a narrow guideway and precise positioning at boarding platforms, facilitating access for the elderly and disabled. As guide wheels can be inexpensively attached to, and removed from, almost any standard model of bus, kerb guided busway systems are not tied to particular specialised vehicles or equipment suppliers. Characteristically, operators contracted to run services on kerb-guided busways will purchase or lease the vehicles, as second-hand vehicles (with guide wheels removed) have a ready resale market. The kerb-guided system maintains a narrow track while still enabling buses to pass one another at speed. Consequently, kerb-guided track can be fitted into former double-track rail alignments without the requirement for additional land-take that might have been necessary were a disused railway to be converted into a public highway. Examples include the Cambridgeshire Guided Busway and Leigh-Salford-Manchester Bus Rapid Transit; in both schemes, it has proved possible to provide space for a wide multi-user path for leisure use alongside the kerb-guided double track, all within the boundaries of the disused railway route. Both the Cambridgeshire and Leigh-Salford-Manchester schemes have reported greatly increased levels of patronage (both on the buses themselves and the adjacent paths), high levels of modal transfer of travellers from private car use, and high levels of passenger satisfaction.