cen·ter·line (sěn

tər-līn

)
n.►  A line that bisects something into equal parts.
►  A painted line running along the center of a road or highway that divides it into two sections for traffic moving in opposite directions, or, in the case of a divided highway, for lines of traffic moving in the same direction at different speeds. 
 [TahlilGaran] American Dictionary ▲