Varying tones and intensities provide distinctive directional cues and do not interfere with traditional horns and bells.
2
互通立交的型式很多，有喇叭型、菱形、环形、苜蓿叶型、半定向式、定向式及复合式等几种基本形式。
There are many types and forms of interchange, such as trumpet type, rhombus type, ring type, alfalfa leaf type, partly directional form, directional form, compound form and so on.
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