Some state police agencies do not investigate other than traffic crimes. Extremely long closures have taken place when local police have conducted investigations. Although this is not necessarily a legislation issue, push for an incident management statute if one doesn't exist. States should has a written agreement with the police and sheriffs association outlining how these investigations will be conducted to reduce confusion and delays. A plan, training, multiple agency commitment, and resources are required.
Police can prioritize tasks, use new technology, and demonstrate an urgency to get it cleared up.
DOT can send their best, have equipment and supplies readily available, prioritize tasks, and operate with a sense of urgency. Investigative times can also be reduced. A new program called photogrammetry is being used in at least 4 states that allows measurements and diagramming to be done strictly from photographs. In one state, the technical investigator using this along with the right priorities was able to complete a criminal crash investigation in 40 minutes. One group of 32 investigators worked on priorities on scene and determined there were only 4 tasks that had to be completed with the lanes blocked.