FLOOD07468 - Laserfiche WebLink

Home Browse Search

6.1.6 Traffic Data Traffic data should include the following: Design or projected ADT Initial ADT Traffic mix Vehicle running cost, $/vehicle mile Average occupancy rate, passengers/vehicle Value of time, $/hr. Length of normal route and detour routes Average speed on each route Fatality rate on each route, people per hundred million vehicle miles Injury ratio, injurieS/fatality Property damage ratio, accidents/fatality Unit cost of injuries, $/injury Unit cost of property damage, $/accident Detour routes must be identified along with the expected overtopping frequency. In other words detour routes may change as the flood frequencies vary. Also, the crossing being designed may be planned as a detour for other crossings and the ADT may be a function of flood frequency. 6.1.7 Embankment and Pavement Repair Costs Although many highway agencies keep elaborate maintenance records, these records are not likely to be of much value in estimating repair costs. Repair costs must be estimated in much the same manner as construction costs. The repair operations must be conceptualized and related to standard construction operations when estimating costs. To estimate repair time and cost, data should include the following: Total volume of embankment, CY Total area of pavement, SY Rate of embankment repair, CY/day Rate of pavement repair, SY/day Unit cost of embankment repair $/CY Unit cost of pavement repair $/SY (assume density of asphalt pavement = 100 lb/SY/in.) Adjustment cost for rapid repair Mobilization cost, $ 6.1.8 Summary of Data Requirements Table 6.1 is a summary of the data requirements and includes an indication of units, possible sources and where the data are used in the analysis. 22 e . , e e