A sneckdown or snowy neckdown is effectively a curb extension caused by snowfall. A natural form of traffic calming, sneckdowns show where a street can potentially be narrowed to slow motor vehicle speeds and shorten pedestrian crossing distances. Coined by Streetsblog founder Aaron Naparstek, popularized by Streetfilms director Clarence Eckerson, Jr. and spread widely via social media, the term first appeared on Twitter on January 2, 2014 at 11:19pm EST. Other Twitter hashtags that have been used to describe snow-based traffic-calming measures include #plowza, #slushdown, #snovered and #snowspace.
- Shortens pedestrian crossing time
- Highlights unused road space
- Calms vehicle traffic
- Allows planners and road engineers to clearly see possible modifications to road structures
- Encourages slower vehicle speeds, increasing safety for all road users, including pedestrians
- Reduce asphalt surfaces, increase plant surfaces, improve the absorption of rainwater by the soil, reduce runoff and floods
- Narrowing road also reduces time for driver to react when pedestrian steps on the road
- Large vehicles are wider than their tracks on snow, so pedestrian can be hit by vehicle mirrors, corners or outstanding parts of the vehicle body/trailer
- In case of a traffic collision narrow road is blocked
- On narrow road there is no way to yield to emergency vehicles as required by the rules
Philadelphia, Pennsylvania – Baltimore and 48th Street: A sneckdown inspired permanent upgrades to the pedestrian environment at this intersection in 2011.
|Wikimedia Commons has media related to Sneckdowns.|
- "Streetfilms - Street Lessons from a Blizzard (with sneckdown!)".
- "Streetfilms - Snowy Neckdowns Redux: Winter Traffic Calming (Now: #sneckdown)".
- "Natural traffic control". The Economist. 13 February 2014.
- "Streetfilms - The Complete Origin of the #Sneckdown".
- "Aaron Naparstek". Twitter.
- "Can Snow Inspire Better Streets? It Already Has". Streetsblog USA.
- Undriven Snow The Economist
- Sneckdown: Using Snow to Design Safer Streets BBC
- What the Heck is a Sneckdown? Treehugger
- 2014's Endless Snow Has at Least Been Good for Transportation Nerds Atlantic Cities
- "Sneckdowns" Reveal the Street Space Cars Don't Use Greater Greater Washington
- Sneckdowns: How snowstorms can teach us to build smarter roads The Week
- The 'sneckdown': Nature's pedestrian island WPIX11 News NYC