| 摘要 |
<p>A method and composition are provided for marking a road to indicate a change in the roads environment, such as a change in temperature. In this way a driver or other road user receives a warning of conditions conducive to the formation of ice. The composition preferably involves the use of encapsulated liquid crystals and may be in the form of a paint or a self adhesive film. The composition may change from transparent to blue or black to blue as the temperature passes below 0 DEG C. This colour change reverses as the temperature rises.</p> |
