English:

Lane splitting legality and related legislative bills in the USA , coded with colors per states:

Yes for motorcycles to get through traffic jam:

Green: 1 state

California: The Governor on August 19, 2016 approved the Assembly Bill No. 51 to codify lane splitting into the Vehicle Code.

Yes for motorcycles to get through traffic jam with considerable limits, like where on the road and expected expiry of permissive law:

Blue-gray: 2 states

Hawaii: The bill to allow the Department of Transportation to conditionally allow motorcycling on shoulders became law as Act 218 on July 12, 2018, to take effect on January 1, 2019 and to repeal on December 31, 2020, after failing two bills in 2017. [1] [2] However, the Department of Transportation has not yet allowed motorcycling on any shoulder per this new law as of January 2019. Utah: The Governor on March 21, 2019 signed the House Bill 149 to allow lane filtering on a roadway divided into two or more adjacent traffic lanes in the same direction of travel with a speed limit of 45 miles per hour (72$nbsp;km/h) or less from May 14, 2019 [3] to July 1, 2022, after failing bills in 2017 [4] and 2014 [5].

Not authorized or legally referenced for motorcycles:

Yellow: with filed legalizing bills: 5 states Mississippi (2016 [6]) Montana (2017 [7]) New Jersey (2006 [8]) Rhode Island (2020 [9]) Texas (2019 [10], 2018-19 [11], 2017 [12], 2015 [13] [14], 2009 [15], 2005 [16]))

Orange: without filed legalizing bills known: District of Columbia and 10 states (Arkansas, Delaware, Idaho, Kentucky, Missouri, New Mexico, North Carolina, Ohio, West Virginia, Wisconsin)

No for motorcycles, often except police officers on duty: