Indeed, in some situations, blue beacon, as well as two-tone special signal assumes the functions of the alarm, which governs the procedure for applying Warnings section of the Regulations.
They are attracting attention being overtaken driver (§ 8.6), the designation of organized columns, carriage of children, large or heavy loads, towing (§ 8.8), and hazard warning lights function (paragraphs 8.10 and 8.11). At the same time included a special sound and light alarm system does not relieve the driver of a special vehicle for carrying out maneuvers in advance of obligation to give signals corresponding light indicator lamps. Note that included a special signal to provide them priority when maneuvering.