Traffic Engineer—Authority—Regulations.
Seattle Mun. Code § 11.16.320
in effect11.16.320 - Traffic Engineer—Authority—Regulations.
The Traffic Engineer is authorized under the supervision of the Director of Transportation to:
A. Formulate traffic rules and regulations and laws, and make recommendations regarding the same;
B. Supervise the movement of all heavy and wide equipment on the streets and alleys of the City;
C. Designate and have charge of the routing and passenger stops of all stages entering, passing through or operating over the streets or alleys of the City;
D. Determine locations at which all vehicles, a class of vehicles, or vehicles with less than a specified number of occupants, shall either make or not make turns or other movements, or shall not use certain lanes of streets or alleys (RCW 47.52.025, 1974);
E. Develop and publish a Traffic Control Manual for In-street Work which sets forth the guidelines for the methods and devices to be used for safeguarding and controlling traffic at and near work in streets or alleys;
F. Designate alleys and short sections of streets for one (1) way traffic;
G. Determine and designate streets, parts of streets, or specific lanes thereon upon which vehicular traffic, regardless of the centerline of the roadway, shall proceed in one (1) direction during a given period and in the opposite direction during another period of the day and shall place and maintain appropriate markings, signs, or other devices to give notice thereof;
H. Decrease the maximum speed allowed upon any street from those established by this subtitle or other ordinances by the City Council, where, on the basis of an engineering and traffic investigation it is determined by the Director of Transportation that such maximum speed is greater than is reasonable or safe under the conditions found to exist on any street; provided, that in no case shall speed limits be less than twenty (20) miles per hour (RCW 41.61.405).
(Ord. 118409 § 25, 1996: Ord. 108200, § 2(11.16.320), 1979.)
Source: City of Seattle, Seattle Municipal Code and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/wa/seattle/codes/municipal_code?nodeId=TIT11VETR_SUBTITLE_ITRCO_PT1GEPRAD_CH11.16TRAD_11.16.320TRENUTEGFetched: 11/1/2026