Due to the phenomenon of induced demand described above, an alternative scenario was run that considered 19 th Avenue as a four-lane facility, only from 24 th Street to Cypress Creek Boulevard, the portion with the greatest amount of travel from the select link analysis. The traffic volume projections from that scenario are summarized below. Table 2. Future Volume Analysis: 2045 Cost Feasible, Alternate Lane Scenario
2L Pk Hr v/c
Daily Capacity (1) 2L
Daily v/c 2L
Daily Capacity (1) 4L
Pk Hr Vol (2)
2L Pk Hr Capacity (1)
4L Pk Hr Capacity (1)
FROM
TO
AADT
24th Street NE 30th Street SE Cypress Village Boulevard Cypress Creek Boulevard
US 41
7,600
17,700
0.43
39,800
350
880
0.40
2,000
24th Street NE 30th Street SE Cypress Village Boulevard Cypress Creek Boulevard
19,100
17,700
1.08
39,800
880
880
1.00
2,000
21,700
17,700
1.23
39,800
1,000
880
1.14
2,000
23,400
17,700
1.32
39,800
1,070
880
1.22
2,000
US 301
18,600
17,700
1.05
39,800
850
880
0.97
2,000
(1) Maximum Service Volume (2) Directional Design Hour Volume (DDHV)
Both projections of average annual daily traffic (AADT) and Directional Design Hour Volumes (DDHV) are summarized. Directional Design Hour Volumes (DDHVs) is the traffic volume expected to use a highway segment during the design hour of the design year in the peak direction. DDHVs were developed using a K-factor (I.e. design hour factor) of 0.09 (Based on the Standard K from the FDOT Project Traffic Forecasting Handbook) and the D (directional) factor of 0.51. This factor is calculated based on existing count data and also falls within the range accepted by the Project Forecasting Handbook based on the roadway classification In the scenario developed and summarized above, traffic volume projections on the section from Cypress Creek Boulevard to US 301 are lower than those in the Cost Feasible scenario, indicating that maintaining a two-lane cross section may be sufficient through the year 2045. Based on the traffic model projections and travel patterns, it is recommended that the portion of 19 th Avenue between 24 th Street and Cypress Creek Boulevard be widened to a four-lane divided roadway to accommodate the future increase in traffic volume caused by an increase in population and employment in the surrounding area along with the future travel patterns along the corridor. The segment 19 th Avenue from US 301 to Cypress Creek Boulevard, and 24 th Street to US 41 be improved to a two-lane divided roadway.
Hillsborough County | 19 th Avenue PLAT Study | June 2020
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