LARIMER COUNTY RURAL AREA ROAD STANDARDS

Appendix F – Guidelines for Traffic Impact StudiesSection F.6 When A Full Traffic Impact Study is Required3. Identification of all existing and proposed traffic signals in the traffic impact area.4. Identification of all bridges or other roadway structures in the traffic impact areathat have been determined to be structurally deficient or functionally obsolete bythe Engineer.5. A summary table listing each type of land use in the proposed development orland use action, the size or amount involved, the trip generation rates used, andthe resultant average daily trips generated. Trip generation must be calculatedusing the latest data contained in the Institute of Transportation Engineers (ITE)Trip Generation manual. If several trip generation rates are listed in the ITEmanual, use the highest rate or provide sufficient justification for a lower rate.Trip generation rates for any land use not easily defined using the ITE manual orfrom any other trip generation data source must be clearly noted.6. The percentage distribution of trips from the proposed development or land useaction to other roads in the traffic impact area.7. Current and projected average daily traffic volumes on all roads in the trafficimpact area. Projected daily traffic volumes shall be based on full buildout of theproposed development or land use action and on any committed (approved)development that would contribute to the traffic volumes on roads in the trafficimpact area as well as growth in background traffic.8. A description of capital improvements to roads in the traffic impact area that areunder construction or planned by any public agency or private entity and theschedule for completing such improvements.9. A summary of whether or not the requirements for capacity, level of service, andadequacy of pavements and structures (See Section F.7, below) for all roads inthe traffic impact area will be satisfied if the proposed development or land useaction is approved and constructed. If the capacity, level of service, andadequacy of pavement and structure requirements will not be satisfied, describethe improvements that must be constructed to satisfy the requirements.F.6 WHEN A FULL TRAFFIC IMPACT STUDY IS REQUIREDF.6.1 When a Full Traffic Impact Study is RequiredA Full Traffic Impact Study will be required for any proposed development or land useaction that will create more than 20 new dwelling units or generate more than 200 newvehicle trips per day, or when determined to be necessary by the Engineer.F.6.2 Full Traffic Impact Study RequirementsThe Full Traffic Impact Study must include at least the following information:1. Describe the traffic impact area, including at a minimum those elementsdescribed in Section F.2. The traffic impact area must be expanded to includethe following:a. All pedestrian or bicycle routes within 1 ½ mile of a schoolb. All routes to any public or commercial attraction within a ten minute walk orbicycle ride from the site.c. All routes to transit facilities within a ten minute walk of the site.Larimer County Rural Area Road Standards Page F-5October 22, 2007