metropolitan area, beyond the reach of the metro, with only one line serving to municipalities such as Tlalnepantla and Cuautitlán Izcalli, but with future lines planned to serve e.g. Chalco and La Paz. Light rail The Xochimilco Light Rail is a light rail system operated by Servicio de Transportes Eléctricos. Cycling The local government continuously strives for a reduction of massive traffic congestion, and has increased incentives for making a bicycle-friendly city. This includes Muévete en Bici and North America's second-largest bicycle sharing system, Ecobici, launched in 2010, in which registered residents can get bicycles for 45 minutes with a pre-paid subscription of 300 pesos a year. There are, as of September 2013, 276 stations with 4,000 bicycles across an area stretching from the Historic center to Polanco. within of one another and are fully automatic using a transponder based card. Bicycle-service users have access to several permanent Ciclovías (dedicated bike paths/lanes/streets), including ones along Paseo de la Reforma and Avenida Chapultepec as well as one running from Polanco to Fierro del Toro, which is located south of Cumbres del Ajusco National Park, near the Morelos state line. The city's initiative is inspired by forward thinking examples, such as Denmark's Copenhagenization. Roads Greater Mexico City is connected through a private network of toll expressways to the nearby cities of Querétaro, Toluca, Cuernavaca, Pachuca and Puebla. Ring roads are the Circuito Interior (inner ring), Anillo Periférico; the Circuito Exterior Mexiquense ("State of Mexico outer loop") toll road skirting the northeastern and eastern edges of the metropolitan area, the Chamapa-La Venta toll road skirting the northwestern edge, and the Arco Norte completely bypassing the metropolitan area in an arc from west (Toluca) to north (Tula) to east (Puebla). A second level (where tolls are charged) of the Periférico, colloquially called the segundo piso ("second floor"), was officially opened in 2012, with sections still being completed. The Viaducto Miguel Alemán crosses the city east–west from Observatorio to the airport. In 2013 the Supervía Poniente opened, a toll road linking the new Santa Fe business district with southwestern Mexico City. Inside the city, ejes viales; high-volume, mostly one-way roads, cross the city from side to side in a vast numbered system. In the late 1970s many arterial roads were redesigned as ejes viales; high-volume one-way roads that cross, in theory, Mexico City proper from side to side. The eje vial network is based on