SR 05:070 - Laserfiche WebLink

32 seconds to drive the length of the sample roadway (1,431.5 feet) at 30 MPH approaching the intersection. Using this sample, all combined, the 900 drivers would travel about 244 miles (900 drivers X 1,431.5 feet = 244 miles) in distance in about eight hours of total vehicle driving time (900 vehicles X 32 seconds = 8.0 hours) along the approaches to this intersection. So in the base peak-hour scenario, the 900 drivers take an average of 32 seconds to drive the approaches to the intersection at the speed limit with no stops or delays. This represents ideal driving conditions along this 30-MPH roadway. · The average driving speed is 30 MPH. · The average driving time is 32 seconds. · There is no delay. · There is no traffic backup. · The average fuel economy is 24.3 miles per gallon. · The vehicles generate 2.2 pounds of automotive emissions. Emissions are related to a standard rate. Here the model expresses that rate an annual tons per year per 10,000 vehicles. Thus, a base rate of 3.2 tons per year per 10,000 vehicles (10,000 vehicles X 2.2 pounds X 260 weekdays = 3.2 tons). BASELINE SCENARIO MODEL SUMMARY TABLE Number of Cars Travel Time per Car in Seconds Baseline 900 32 0 Delay TimeI Average per Car inI Speed Seconds (MPH) 30 Average I Total Traffic Hours of Backup Delay None 0 Travel Time (Hours) 8 Distance Traveled (Miles) Gallons of Fuel Consumed Baseline 10 Fuel Economy (MPG) 24.3 CO Emissions (Pounds) 1.54 Nox Emissions (Pounds) 0.31 VOC Emissions (Pounds) 0.35 LOS A - 900 Drivers Scenario Driving Conditions The model was rerun to show what happens to these same 900 drivers when half are placed on the north/south street and half on the east/west street approaches to this sample intersection. The exact same intersection was used, except a traffic signal was assumed to control the intersection. The same number of drivers travel the same distance they did in the Baseline Scenario, but now delay is introduced as they have to take tums crossing the intersection. The following exhibit is a screen capture from the City's traffic simulation model. It shows the intersection as a two-phase traffic signal with the light just changing to yellow on the east/west street. Note here the northbound short queue at the red light.