The effort to suspend the hours of service restart provision will come to a head on the Senate floor this week, possibly this afternoon.

Trucking companies that want the restart suspended while the Federal Motor Carrier Safety Administration studies its effects are pressing to keep that provision in the Senate’s transportation appropriations bill.

On the other side are other carriers allied with safety advocates and the safety enforcement community. They want to keep the current restart in place while the agency conducts the study. The Senate is scheduled to begin debate today on the appropriations bill containing the amendment that would suspend the restart. It may not reach the restart issue before close of business, however.

American Trucking Associations is leading the push to preserve the amendment championed by Sen. Susan Collins, R-Maine, that would suspend the current restart.

ATA is hosting a call-in this morning for trucking executives to discuss how the current restart provision is affecting their business. The association says the restart cuts productivity, harms drivers and does not improve safety.

The opposing side has scheduled a call-in for this afternoon.

Advocates for Highway and Auto Safety is hosting a call that will include Steve Williams, chairman and CEO of Maverick USA, in support of a move by Sens. Cory Booker, D-N.J., and Richard Blumenthal, D-Conn., to remove the Collins amendment.

Williams is also chairman of The Trucking Alliance, a group of a half-dozen carriers that would prefer to keep the restart as it is while FMCSA completes the study.

Also on the call will be Steve Keppler, executive director of the Commercial Vehicle Safety Alliance, which Monday posted a statement opposing the suspension.

“Legislating changes to the HOS rules now, not even a year since becoming effective, creates significant uniformity […]