This month, LADOT updated the Vision Zero High Injury Network (HIN), the network of city streets where we can make the biggest difference in our efforts to save lives. The update can be found on the City’s Geo Hub, our public platform for exploring and visualizing location-based open data.
The first iteration of the HIN launched in 2016 and was based on collision data available from 2009-2013. Though only 6% of Los Angeles’ street miles are on the HIN, we found that nearly seventy percent of all deaths and severe injuries of people walking occurred on this network. The HIN helps us focus our safety efforts, maximize resources and save lives.
Vision Zero’s 2017 Action Plan called for an update of the City’s High-Injury Network using new collision data made available by the Statewide Integrated Traffic Records System (SWITRS). As a first step, we mapped fatalities and serious injury collisions (KSIs) involving people walking and bicycling using the most recent data (2012-2016). With this new data set, we found that the corridors with a high density of KSIs from 2012-2016 were nearly the same as the HIN corridors identified previously. This information will be used to identify a new round of priority corridors for safety improvements.
Many of the Vision Zero improvements on the High Injury Network began installation in May 2017 and safety data over that time has not yet been included in our High Injury Network analysis (SWITRS data from 2017 and 2018). Where we’ve made Vision Zero improvements and have available safety data, like the Hollywood and Highland intersections, we’ve seen positive results. See attn. Media’s coverage of the scramble here. As new data becomes available and incorporated, we hope to see fatalities decline and remove streets from the HIN.
These innovative crosswalks are saving pedestrian’s lives. pic.twitter.com/LOQ6SB1mh9
— ATTN: (@attn) May 5, 2018
Changes to the HIN
Our HIN updates can be categorized into the following types:
- Additions: We identified three new streets (6th St, Glenoaks Blvd, and Glendale Blvd) that witnessed a high number of KSI collisions between 2012 and 2016 yet were not part of the original HIN. Seventeen KSI collisions involving a pedestrian or a bicyclist occurred on just 2.8 miles of these streets in the last 5 years.
- Extensions: We also saw that a high number of bicycle and pedestrian collisions occurred at the edges of the existing HIN. To capture these new hotspots of collision activity, we have extended 13 of the existing HIN corridors.
- Connections: We identified two streets (Vanowen St and Central Ave) where we connected existing HIN corridors based on the newer collision data.
High Injury Network Changes
|Street||To/From||HIN Modification||Miles||Bicycle and Pedestrian KSI Collisions||KSIs per Mile|
|6th St.||Ogden Dr./Cochran Ave.||New Corridor||0.7||6||8.6|
|Glenoaks Blvd.||Peoria St./Roscoe Blvd.||New Corridor||1.6||7||4.4|
|Glendale Blvd.||Revere Ave./Glenhurst St.||New Corridor||0.5||4||8.0|
|48th St.||Crenshaw Blvd./Western Ave.||Extension||1.2||6||5.0|
|Vanowen St.||Woodman Ave./Ethel Ave.||Connection||0.8||3||3.8|
|Vanowen St.||Hatillo Ave./De Soto Ave.||Extension||1.2||5||4.2|
|Nordhoff St.||Haskell Ave./Reseda Blvd||Extension||1.8||7||3.9|
|Riverside Dr.||Laurelgrove Ave. /Van Nuys Blvd.||Extension||2.7||6||2.2|
|Ventura Blvd.||Topanga Canyon/Fallbrook Ave.||Extension||0.9||4||4.4|
|Normandie Ave.||Melrose Ave./Beverly Blvd.||Extension||0.5||5||10.0|
|Beverly Blvd.||Bonnie Brae St./Rampart Blvd.||Extension||0.5||5||10.0|
|Olympic Blvd.||Crenshaw Blvd./La Brea Ave.||Extension||1.3||6||4.6|
|Washington Blvd.||La Brea Ave./Redondo Blvd.||Extension||0.3||4||13.3|
|Vermont Ave.||88th St./120th St.||Extension||2.4||9||3.8|
|Central Ave.||Slauson Blvd./Manchester Ave.||Connection||2.1||10||4.8|
|Cesar E Chavez Ave||Keller St./ Vignes St||Extension||0.3||5||16.7|
In total, these additions to the HIN cover 19 miles, but account for over 90 bicycle and pedestrian KSI collisions in the last 5 years. After making these modifications to the network, the share of bicycle and pedestrian KSIs on the HIN remains at roughly two-thirds (64 percent).
This updated HIN is available on the City’s GeoHub. We will also be publishing the updated collision data to the GeoHub as well, so stay tuned!