Following news of the American Trucking Associations' urging of the Federal Motor Carrier Safety Administration to further study the science behind split sleep, many readers commented on a need for more permissive split-sleeper-berth rules. Many drivers remembered the legal ability to split in ways other than the current 8- and 2-hour possibility. Meanwhile, on the eve of the original Jan. 1 deadline for the California Air Resources Board's 2014 Truck and Bus Rule requirements, operators sound off.