by Tracy Zafian, Research Fellow
Smart phone apps, such as Waze and Google Maps, help drivers find the quickest routes to their destinations using real-time traffic data. Sometimes this means that drivers are being directed off congested highways to streets through residential neighborhoods instead. Not everyone is happy about this, including traffic planners and people living in these neighborhoods who don’t want higher volumes of traffic on their streets.
News media have reported these impacts of traffic apps on Cape Cod neighborhoods, and in the Boston area. Quoting Police Sergeant Charles Hartnett, head of Medford’s traffic division, in one news report: “For the residents, it’s a safety issue.” Some communities are responding by restricting a cut-through and turning movements into residential neighborhoods during commuting hours when the traffic is heaviest. In some places, certain streets are being changed to one-way roads as another means to divert traffic. When such changes are made, transportation planners often share these updates with the app companies so that their maps and algorithms can be adjusted accordingly.
The traffic apps can also present a challenge to safety officials in emergency situations. For example, in the Los Angeles area, while officials were busy fighting wildfires, they implored residents to ignore the apps that were directing them to lightly traveled roads in the fire zones, and put up message signs telling drivers “Don’t Trust Your Apps.” As described in this USA Today article, the fires and evacuation orders were the reason the traffic volumes is these areas were so low. In Vermont, the shortest way isn’t always the safest way. Cars have been abandoned because the driver followed Google maps, only to end up on a road that was not maintained in the winter.