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traffic signals at County Road C. The improvements would be to upgrade the signal system to add gates and install medians. The improvements would cost between $100,000 and $150,000. 10. Victoria Avenue (DOT #061358N) Victoria is a 4 -lane roadway. The warning devices are cantilever signals with flashing lights. The risk index is 8,220. The land use is primarily residential. The County is planning roadwork in the area but according to MnDOT the railroad signals will not be changed. The improvements would be replacing the signal system with cantilevers and gates. The cost would be $175,000 to $200,000. 11. Dale Street (DOT #061359V) Dale Street is a 2 -lane roadway with a trail on the east side. The warning devices are flashing light signals. The risk index is 4,377. The improvements would be to replace the signal system with flashing lights and gates. The cost would be $175,000 to $200,000. 12. South Owasso Boulevard (DOT#061362D) South Owasso Boulevard is a 2 -lane roadway with crossbucks and stop signs. The risk index is 2,653. Placement of gates is complicated by private driveway that is in the northeast quadrant. The improvements would be installation of flashing lights and gates and possible road realignment. The improvements would cost $200,000 to $250,000. 7.0 RISK ANALYSIS The FRA has developed a risk analysis to evaluate proposed quiet zones. The analysis is based on their national crossing inventory and accident databases. The accident prediction model uses 12 criteria to determine the probability and severity of a vehicle -train crash at each crossing. Using these calculations, a National Significant Risk Threshold (NSRT) and an individual Risk Index with Horns (RIWH) can be developed. The FRA have also compared crossings that have had quiet zones in-place with non -quiet zone crossings and have developed a QZRI and an effectiveness rating for each type of SSM. Using their Quiet Zone Calculator, these various index numbers are computed and provide the basis for what needs to be done at each crossing in order for a community to obtain a Quiet Zone. Appendix B has the quiet zone calculator results from the FRA website. Risk is averaged over the railroad crossings in the proposed zone and compared to a National Significant Risk Threshold level (NSRT). This risk analysis computes a Risk Index with Horns (RIWH) and a Quiet Zone Risk Index (QZRI). This analysis determines what crossing improvements are needed for a community to establish a quiet zone. At a minimum, all new quiet zones must have railroad signals with gates. Appendix D is a process flow chart that outlines the steps needed to obtain a quiet zone.