Has Otolovers seen a glass ball-like object embedded in the asphalt? It turns out that the object has an important useful function for road users you know.
The technical name of the ball is the road nail or glass road stud and become one of the supporting means of safety in driving. The reason, this small object can reflect light when the weather is dark or even at night so that road users can see the road markings with more clearly.
In order not to interfere with road users, the road stud, another term from the road spikes, should not stand more than 15 mm above the road surface. If equipped with a reflector, the height of this object should not exceed 40 mm.
**Materials used are plastic, stainless steel, or aluminum mix. The reflected light reflectors must also be able to function in a variety of road conditions.** 
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There are 3 sizes of road spikes according to the same rules. The nail of the road can be square with a length of 10 cm for road with user speed below 60 kph. As for the speed of more than 60 kph used marka with each side measuring 15 cm.
The road spikes can also be 4 rectangles with a minimum width of 10 cm and a length of 20 cm. If the object is round it must have a diameter of at least 10 cm.
Road spikes can be found at the border of the lane, the longitudinal marks are dashed lines as a warning sign, the axis of the road as the path separator, the longitudinal marks are intact lines as the bus lane separator, the mark of the chevron, or the traffic island.
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