# Methodology to Assess Sustainable Mobility in LATAM Cities
## 3 Results
### Key Performance Indicators
#### 3.2.1 Accessibility  
_Physical infrastructure:_ Based on public data, the Saltillo Metropolitan Area has 2987 km of roads--measured by the length of the central axis--and a road density of 411.9 km/100,000 habitants, of which 38.8% correspond to primary roads, 38.2% to secondary roads, and 23% to toll roads [55]. There are no exclusive lanes for public transportation. 68.5% of city blocks in Saltillo have paved roads. The greatest accessibility to sidewalks is concentrated in the interior of the city and in the areas with the highest housing density. The lowest levels of development of this type of infrastructure are distributed in the periphery of the municipality. In 55.2% of the city blocks, roads have pedestrian accessibility. In 29.9% of them, only some of their streets have pedestrian accessibility. In terms of pedestrian infrastructure for disabled people, only 2.6% of city blocks in Saltillo have wheelchair ramps on the roads. In terms of pedestrian streets and alleys, Saltillo is underdeveloped, with only 6.5 km throughout the city, representing 0.90 km/100,000 inhabitants [56]. Following the methodology based on Web Map Services stated in Section 2.2.1, a diagnosis of the mobility infrastructure of Saltillo was performed. The cartographic representation was obtained from the National Institute of Statistics and Geography [57]. It contains data from roads in Mexico. These data are then shaped into a GIS software (ArcMap) which consists of projecting and purifying all the road data contained. Then, a random geospatial sampling was carried out with the WMS software (Google Maps-Street View add-on). Fifty locations randomly distributed along the city's road network were considered to diagnose the roads. Data shown in WMS are based on public measurements between July 2009 and September 2019. Figure 3 shows an illustration of the steps followed on a single randomly selected location. Figure 2: Location and topography of Saltillo. _Source_: Authors. Results obtained show that the infrastructure for mobility in the city of Saltillo has many opportunities for improvement. Of the points analyzed, the most frequent type of road is boulevards with 58%, followed by streets with 20%, while avenues and roadways exist in a lower proportion with 2%. We used the classification established by the Mexican [57]. Asphalt coverage is the most common (98%) in the roads analyzed, with mostly a favorable pavement condition. The remaining 2% are covered with stone (cobblestone). In relation to the damage observed on the roads, the losses of the layers of the structure cover 46%, being reflected in flaking, potholes and/or patches in the asphalt surface layer, followed by cracks (37%), and finally, deformations on the surface with 17%. Sidewalks structures are present in 60% of the roads analyzed, street signs in 16%, speed reducers in 12%, and bike routes in 6%. Results are summarized in Figure 4.  
Figure 3: Illustration of using web map services to (**a**) sample, (**b**) locate, and (**c**) diagnose Saltillo’s mobility infrastructure. _Source_: Authors. _Energy supply:_ Figure 5 shows the gas stations and e-charger currently operating in the city. It was obtained using web map services (google maps and Municipios de Mexico). This figure shows that the city has 90 gas stations and 6 electric vehicle (EV) charging stations. The fuel stations are widely distributed in the city, while outside this area, most of the stations are located within main avenues. On the other hand, the EV-charging stations are only located in the northern city, which substantially limits its accessibility. Figure 4: Saltillo roads (**a**) type, (**b**) deterioration, and (**c**) condition results using web map services. Figure 5: Location of gas stations and EV-charging stations in the city of Saltillo.