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Report Retention The original copy of each truck inspection report and the certification of repairs must be retained for at least three (3) months from the date the report was prepared. Important Before attempting maintenance on any chipper, read and follow the manufacturer's recommendations Work Zone Setup Controlling Traffic Tree care crews may need to: ❑ Use temporary traffic control devices, such as signage, road cones, paddles or flags in a consistent manner throughout the work zone. ❑ Use a flagger or flaggers when conditions warrant. ❑ Set up temporary traffic control within a reasonable time prior to work so that motorists do not become complacent and ignore warning signs and devices when work begins. ❑ Ensure that all traffic control devices are in place. Missing traffic control devices create the potential for motorists to inadvertently enter the workspace or exit the highway in the wrong place. Injury Prevention Measures - Work zone layout Tree care crews may need to: ❑ Assign a crewmember who is knowledgeable in traffic control principles overall responsibility for the safety of the work zone setup. ❑ Ensure that the work zone is set up in accordance with the Millennium Edition of the MUTCD. ❑ Authorize the designated crewmember to temporarily halt work until unsafe conditions related to temporary traffic control have been eliminated. ❑ Document work zone setup and changes throughout the course of a project. Retain these records in a "job file" as a reference for future jobs. Use of temporary traffic control devices Most temporary traffic control zones are divided into four areas: the advance warning area, the transition area, the activity area and the termination area: Advance warning area — section of road where drivers are warned about the upcoming work zone. Warning has to be far enough in advance of the work to give drivers time to react, yet not so far that it encourages drivers to ignore the warning or react sluggishly. On urban streets, the first warning sign should placed 4-8 times the speed limit (mph) in feet before the activity area, using the high end of the range when the speed limits are relatively high. On rural highways, it should be 8-12 times the speed limit in advance. 17 Warning sign size is based on speed limits: • On secondary roads or city streets where speeds are very low, minimum 36 -inch signs are acceptable. • Where speeds and volumes are moderately low, 36 -inch signs may be used, 48 -inch are recommended • For high speed/volume roads, 48 -inch signs are needed.