Winter Maintenance Myth Buster

Liverpool’s gritters play a crucial role during poor weather conditions by covering approximately 600 kilometers of roads in a single run. Often, these vehicles make two trips, typically operating late at night and in the early morning hours when road traffic is minimal, helping to maintain safer travel conditions across the city. Below are several important clarifications regarding the gritting process and common misunderstandings about how salt is used to manage icy roads in Liverpool during winter.

One common misconception is that spreading salt on icy roads immediately melts the ice. In reality, the salt initiates the de-icing process, but its movement by passing vehicles is necessary to fully break up the ice. Since traffic levels typically drop overnight, roads may remain slippery for some time, so caution is advised during these periods. Another frequent myth is that salting prevents ice from forming in all conditions. While salt does lower the freezing point of water and stops ice formation at temperatures around 0°C, it becomes less effective below -5°C and ceases to work at -10°C. Pre-salting roads helps create a separation layer, preventing snow from bonding to the surface so it can be physically removed or broken up by traffic.

The idea that salt rapidly melts fresh snow is also incorrect. Salt works best after snow has been partially cleared, as it requires interaction with the road surface to be effective. Gritting crews typically remove snow to a depth of about 20 millimeters before applying salt to protect road surfaces and enhance the melting effect. Additionally, salt’s efficacy is temperature-dependent. It does not melt ice below -8°C and has reduced effectiveness below -5°C, which limits its capability during extremely cold spells.

There are also misconceptions around personal responsibility for clearing snow and ice. Contrary to some beliefs, people are encouraged to clear snow and ice from the pavement outside their homes or from public areas to prevent accidents, and there is no legal risk of being sued if someone slips after such clearing. Guidance for safe snow and ice removal is available from trusted sources such as the Met Office. Finally, when a gritter passes without visibly spreading salt, it is typically because modern, computer-controlled equipment applies salt precisely onto the road surface rather than spraying it widely. Salt can also be directed to either side of the vehicle to ensure full road coverage. Liverpool’s gritting teams also take care of footpaths, especially in busy areas, and manage 191 community grit bins placed throughout the city to help residents maintain safe walkways. Detailed information on gritting routes and community salt bin locations can be found on the Liverpool City Council’s website