Back in 2016, Houston was ranked #20/30. Even back then, the group (https://smartgrowthamerica.org/wp-content/uploads/2016/06/foot-traffic-ahead-2016.pdf) suggested that Houston -along with Miami and Los Angeles- was showing clear signs of growth in walkability. Sure enough, all of these metros have jumped ahead in this ranking (Los Angeles to #8, Miami to #13, Houston to #18). Can't be too upset with that!