However, it faces a growing number of challenges, including deteriorated main routes and worsening traffic congestion. Service quality has declined as the system has not been able to keep up with demand, which has encouraged greater use of alternatives, including private vehicles. Programme implementation needs careful monitoring and analysis, as such regimes can create incentives to increase the private car fleet. Bogota also closes road segments for selected hours on holidays and weekends, creating an additional 121 km of pedestrian and bike path called Ciclouia.