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For purposes of this chapter, the following definitions apply:

A. “Affected intersection” means a signalized system intersection within a mobility management area in the city; or over which the city has operational responsibility under an interlocal agreement, as authorized by Chapter 39.34 RCW or other law; or where there is such an interlocal agreement to apply this chapter to the intersection; and to which the development proposal is projected to add 20 or more P.M. peak period average trips.

B. “Affected mobility management area” means any mobility management area with an affected intersection.

C. “Area-average level of service” means the sum of the critical volumes of the signalized system intersections within a mobility management area divided by the sum of the capacity of the signalized system intersections within that mobility management area.

D. “Background traffic” means the volume of traffic that is projected to occur on the street system as of the anticipated date of occupancy of a proposal. Background traffic includes regional traffic, anticipated traffic from all proposals which have been approved under Chapter 23.10 BCC, approved Process I and Process II applications, and approved Process III conditional use, shoreline conditional use, preliminary plat, and planned unit development applications within a community council jurisdiction. Approved applications shall be excluded from background traffic calculations upon expiration of the director’s concurrency approval as set forth in BCC 14.10.040(F).

E. “Concurrency” means a requirement of the Growth Management Act (RCW 36.70A.070(6), now or as hereafter amended) that the city must enforce an ordinance precluding approval of a proposed development if that development would cause the level of service of a transportation facility to fall below the city’s adopted standard, unless a financial commitment is in place to complete mitigating transportation improvements or strategies within six years. In the city of Bellevue, “transportation facility” is defined as any mobility management area. When a development fails to meet the concurrency test, mitigation will be required to accommodate the impacts of the development. Transportation demand management and other nonroadway strategies may be used.

F. “Congestion allowance” means the number of signalized system intersections allowed to exceed the level-of-service standard adopted for a mobility management area.

G. “Degradation” means an increase in the volume/capacity ratio (v/c ratio) above the area-wide level-of-service standard for a mobility management area as established in BCC 14.10.030; or an increase beyond the congestion allowance in the number of signalized system intersections exceeding the level-of-service standard.

H. “Director” means the director of the transportation department for the city of Bellevue, the director’s authorized representative, or any representative authorized by the city manager.

I. “Fully funded project” means a project in the most recently adopted capital investment program plan for the city or similar capital program of another jurisdiction which has sufficient funding committed for construction.

J. “Level-of-service” means the degree of saturation of an intersection. It is measured as the summation of the flow ratios for all critical lane groups in the intersection.

K. “Mitigation,” for the purposes of this chapter, means transportation demand management strategies or facility improvements constructed or financed by a developer which return a degraded area-wide level of service to the standard of the area. If an area already exceeds the standard prior to the development proposal, “mitigation” means transportation demand management strategies or facility improvements constructed or financed by a developer that at the least maintains the area-wide level of service existing prior to the development.

L. “Mobility management areas” means distinct areas with boundaries based on factors such as area-specific mobility targets. Mobility management areas are shown mapped in BCC 14.10.060. Some mobility management areas include intersections outside the city’s jurisdiction; see Transportation Element policies TR-33.

M. “P.M. peak period” means the two hours between 4:00 p.m. and 6:00 p.m.

N. “P.M. peak period (averaged) level of service” means the v/c ratio of a system intersection calculated using the P.M. peak period average trips.

O. “P.M. peak period average trips” means the average of the total vehicular trips between 4:00 p.m. and 5:00 p.m. and between 5:00 p.m. and 6:00 p.m.

P. “System intersection” means an intersection which contributes to the system function within each mobility management area. System intersections within the mobility management areas are listed and mapped in BCC 14.10.060.

Q. “Transportation demand management” means strategies designed to increase the efficiency of existing capital transportation facilities, including, but not limited to, transit and ridesharing incentives, flexible working hours, parking management, and pedestrian and bicycle enhancements to decrease single occupancy vehicle trips.

R. “Under construction” means when a construction contract for a project has been awarded or actual physical alteration or improvement has occurred on the site.

S. “Volume/capacity ratio (v/c ratio)” means the flow ratio for a lane group as defined in the Transportation Research Board Highway Capacity Manual 2000, now or as hereafter amended, using the operational analysis method where “v” equals the actual or projected demand flow rate for a lane group in vehicles per hour, and “c” equals the capacity of a lane group in vehicles per hour. (Ord. 5883 §§ 2 – 7, 2009; Ord. 5309 § 1, 2001; Ord. 5081 § 2, 1998; Ord. 4823 § 1, 1995; Ord. 4606 § 2, 1993.)