Design criteria for the proposed improvements are based on the FDOT Design Manual, effective January 2026. A summary of the design criteria used to evaluate existing conditions and develop proposed improvements is listed in Table 4-1 on the following pages.
Table 4-1 – Design Criteria
| Design Element | Description | 2026 FDM (or Other) | ||
|---|---|---|---|---|
| General | ||||
| Functional Classification | Urban Principal Arterial Other | (Straight Line Diagram 3/24) | ||
| Context Classification | C3C – Suburban Commercial\n- From US 301 at 9th St to Railroad (RR) Crossing #624712-B\n- From 1st St East to south of 17th St East\nC4 – Urban General\n- From RR#624712-B to 1st St East\nC3R – Suburban Residential\n- From south of 17th St East to north of 25th Street East | (ETDM Project #14507) | ||
| Design Speed | 40 mph - 45 mph (30 mph for ramps) | Table 201.5.1, 201.5.2 | ||
| Design Vehicle | WB-62FL | Section 201.6 | ||
| Typical Section | ||||
| General-use | Auxiliary | Ramps | ||
| Travel Lane Width | 11 ft | 11 ft | 15 ft | Table 210.2.1, 211.2.1 |
| Shoulder Width – Median – Outside | 10 ft 10 ft | 8 ft 10 ft | 4 ft 4 ft | Table 210.4.1, 211.4.1 |
| Median Width – Left Turn Lane + Elev Lanes | 32.5 ft | -- | -- | Table 215.2.2 |
| – No Left Turn Lane + Elev Lanes | 22 ft | -- | -- | Table 210.3.1 |
| Border Width | 14 ft | 14 ft | 12 ft | Table 210.7.1 |
| Clear Zone | 24 ft | 14 ft | 14 ft | Table 215.2.1 |
| Lateral Offset to Bridge Pier | 16 ft | 4-6 ft | 4-6 ft | Table 215.2.2 |
| Cross Slope (inside to out) | 2% - 3% | 2% | 2% | Figure 210.2.1 |
| Horizontal | ||||
| Deflection Without Curve (Max) | 1 degree | -- | -- | Section 210.8.1 |
| Curve Length (Min) | 400-675 ft | 400-675 ft | 400-450 ft | Table 210.8.1 |
| Curve Radius (Min) | 559 ft | 559 ft | 231 ft | Table 210.8.2 |
| SE Transition Rate (e max = 0.10) | 1:200 – 1:160 | 1:200 | 1:175 | Table 210.9.3 |
| SE Transition Length (Min) | 100 ft | 100 ft | 100 ft | Section 210.9 |
| Taper Rate (Min) | L = W × S | L = W × S | L= (W × S2)/60 | Section 210.2.5 |
| Vertical | ||||
| Max Grade (Flat Terrain) | 6% | 6% | 8% | Table 210.10.1 |
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