NE T WORK ANALYS I S GIBSONTON AREA
Table 1.
Funded/Committed Projects Included in E+C Model
Sideswipes crashes occurred along Gibsonton Drive, US 41 and I-75. Left turn crashes occurred along Gibsonton Drive. Pedestrian and bicycle crashes dispersed throughout the area with multiple crash occurrences along US 301, and at the Boyette Road/ McMullen Road intersection. In the PM peak period: A high frequency of rear end crashes occurred on Gibsonton Drive between I-75 and US 301, and along US 301, I-75 and US 41. Sideswipes crashes occurred along I-75 and US 301. Left turn crashes occurred along Gibsonton Drive/Boyette Road and US 301. Pedestrian and bicycle crashes dispersed throughout the area with multiple crash occurrences along Gibsonton Drive/Boyette Road. 3.3 Existing Network Performance The initial Aimsun model was developed using the existing roadway network along with funded or committed projects. The funded or committed projects that were included are shown in Table 1 and Figure 15. The performance results of the E+C Model were analyzed to illustrate how vehicles move through the network and isolate congestion hot spots by peak travel period. Volume to capacity (V/C) ratios were determined for each of the major roadways within the study area in the AM and PM peak periods (see Figures 16 and 17). As shown in Table 2, intersection approach and overall intersection delays were also calculated for all major intersections within the network. Figures 18 and 19 show the delay for each intersection approach in the AM and PM peak periods, respectively. Figure 20 shows overall intersection delay in the AM and PM peak periods.
CIP
Intersection
Improvement
East Bay Rd/ Symmes Rd Intersection Fern Hill Dr/ Gibsonton Dr Intersection Riverview Dr/ US 301
69600314
Convert signalized intersection to a roundabout
Intersection geometry improvements, including triple left turns on the northbound approach and dual left turns on the westbound approach Intersection geometry improvements including dual left turns on the westbound approach
69600311
69645121
It should be noted that the delay information provided in these tables and figures are calculated based on mesoscopic analysis and should not be compared to delay results seen in microscopic analysis. This means that even though an intersection appears to be performing well using microsimulation standards, it may not be operating well in the context of the network. Delay should be looked at comparatively to the other intersections and approaches within the network. The E+C Model results show that due to the limited number of east- west and north-south corridors within the study area, drivers do not exhibit much variability in their travel patterns in the AM and PM perk periods. Dramatic growth is expected in the Ventana community located between I-75 and US 301, south of Gibsonton Drive. This area will see new construction of homes and schools, with drivers utilizing smaller roads with insufficient capacity, such as Symmes Road and Fern Hill Drive, to access the main corridors of Gibsonton Drive, US 301, and US 41. These main corridors experience heavy congestion from regional traffic commuting through the network.
Summary Report
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