A. General: There shall be a minimum spacing between the nearest edges of pavement of adjacent access connections along collector streets and principal and minor arterial streets, as provided in table 11-15-8, "Minimum Access Spacing", of this section. (Refer to section 11-15-7, figure 11-15-7, "Access Spacing Measurements", of this chapter.)
Posted Speed Limit (Miles Per Hour) | Principal Arterial (Feet) | Minor Arterial (Feet) | Collector (Feet) |
30 | 290 | 260 | 245 |
35 | 310 | 280 | 260 |
40 | 340 | 305 | 285 |
45 | 380 | 340 | 315 |
50 | 425 | 380 | 345 |
55 | 480 | 420 | 380 |
Source: Transportation research board (TRB) "Access Management Manual", copyright 2003.
B. Access Spacing, Opposite Sides Of Street: To prevent conflicting left turn movements, the centerlines of access connections on opposite sides of a street shall either align, or shall be offset by a minimum distance of one hundred fifty feet (150'). This provision shall not apply where a permanent median exists without break for these access connections. (Refer to section 11-15-7, figure 11-15-7, "Access Spacing Measurements", of this chapter.)
C. Alternatives: Where no other alternatives exist, construction of an access connection may be allowed in a location farthest from an intersection and the next nearest access connection. To provide safe, adequate access in this circumstance, consideration shall be given to a right in/right out only access connection, if feasible. In such case, the applicant shall demonstrate conformance with section 11-15-13, "Common Access And Internal Cross Access", of this chapter.
D. Increased Spacing Requirements: The city may require access spacing that exceeds the minimums required in table 11-15-8, "Minimum Access Spacing", of this section in circumstances warranted by the volume of truck traffic or other operating characteristics of the site. (Ord. 6124, 6-28-2010)