CFR › Title 33 › Part 167 › §167.5233 CFR §167.52Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)A separation zone 1 mile wide is established and is centered upon the following geographical positions:(b)A traffic lane 1/2 miles wide is established on each side of the separation zone.