Answer:

median

Answer	Crossword Clue
MEDIAN	Highway divider
MEDIAN	Middle of the road
MEDIAN	Highway strip

MEDIAN	Line segment inside a triangle
MEDIAN	Summary statistic
MEDIAN	Math class calculation
MEDIAN	In the middle.
MEDIAN	A point between.
MEDIAN	Middle.
MEDIAN	Geometric line
MEDIAN	Strip in the middle of a highway

MEDIAN	Mode's companion
MEDIAN	Kind of strip or point
MEDIAN	Middle
MEDIAN	Highway feature
MEDIAN	... income
MEDIAN	Mean alternative
MEDIAN	Highway divide
MEDIAN	Being in the center

MEDIAN	Like an ancient Persian
MEDIAN	Strip down the highway
MEDIAN	Parkway feature
MEDIAN	Part of a parkway
MEDIAN	Middle of the road?