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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Interstate numbers:

NORTHBOUNDLANES: Half of almost any odd-numbered Interstate highway
EAST: Even-number Interstate heading
SPEEDS: Interstate numbers
EASTWEST: Like even-numbered interstate highways
ODD: Like the numbers of interstates that run north-south
EXIT: Number on an Interstate sign
EXIT: The highest-numbered one on a U.S. interstate is 880