Road slipperiness is a condition of low skid resistance due to insufficient road friction. The two ways to measure road slipperiness are surface friction testing and stopping distance testing. Both problems increase slipperiness, especially when the pavement is wet. Road slipperiness can be prevented or delayed by proper pavement design. In 1886 Joly proposed a theory on the slipperiness of ice. Maintenance activities affecting slipperiness include drainage repair, snow removal and street sweeping. However, this type of beam was eventually banned due to its extreme slipperiness. As such, road agencies have a number of approaches to decreasing road slipperiness. Public works agencies spend a sizeable portion of their budget measuring and reducing road slipperiness. Road slipperiness can contribute to car accidents. The slipperiness of the phrase points to its real goal, 'sovereignty by stealth,' without rebellion.