From the Australian:

"The US report recommends a "comprehensive review" of checkpoint and roadblock procedures.

It suggests replacing spotlights and warning shots with flashing lights and sirens to stop civilian cars at roadblocks, and the installation of road signs to warn motorists that they are approaching a checkpoint.

"The soldiers and leaders must look at the position ... from the perspective of Iraqi drivers and what they might see."

The report also recommends new rules to preserve the scene of friendly fire incidents, admitting its forensic findings were limited because the car, roadblock and bullet shells had been removed by the time inspectors arrived."

I find that last paragraph especially interesting.

Apparently the Italian version of the investigation will be released Monday night.