By evaluating transport system performance based primarily on vehicle traffic speeds, conventionalevaluation also tends to ignore other accessibility factors such as the quality of alternative modes (walking,cycling and public transport), roadway connectivity, and proximity. These overlooked factors can significantly affect overall accessibility. For example, research byEwing and Cervero (2010) and Handy, Tal and Boarnet(2010) indicate that roadway connectivity (the density of connections within a road network) significantly affects the distances that people must travel to reach
destinations, as illustrated in Figure 3. Similarly, studies by Levine, et al (2012) and Levinson (2013) indicate that development density has a much greater effect than
automobile travel speed on the number of jobs and services available within a given travel time.