Note: Traffic counts cover various street segments and are provided for informational purposes only. All data should be verified with the appropriate Traffic Operations staff at (707)441-4194, and/or verified in the field, prior to use. The last comprehensive counts were conducted in 1997. Some street segments are more current as the date indicates. The City of Eureka uses a 1.4% per year growth rate as a rule of thumb.
Current volumes can be adjusted to future volumes with the Growth Factor. To calculate a growth factor based on a growth rate over several years, use the following formula:
GF = (1+r)^Y = Growth Factor
r = Growth Rate
Y = Number of years
For example the growth factor for 1.4% growth over 8 years is:
GF = (1 + 0.014) ^ 8 = 1.118
A street segment showing a traffic count of 1000 in 1997 would be adjusted as follows:
Adjusted volume = 1000 x 1.118 (GF) = 1118
Click here for Traffic Counts.