Description: Left-in left-out (LILO) treatments are typically applied on arterial roadways with medians and consist of a channelizing island in the median which helps direct vehicles turning left both on to and out of minor streets or driveways. Additionally, the treatment contains an exclusive left turn lane for vehicles turning left on to minor streets/driveways and left turn refuge with varying acceleration lane lengths for vehicles turning left out of minor streets/driveways (these left-turning vehicles then merge with major street traffic).
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