Table 1 Street Design Standards

Minimum Right-of-Way Width	Dimensions in Feet
Alley	20
Local streets*
1.   Urban 1/on-street parking allowed with attached sidewalk    2.   Urban 1a/on-street parking allowed with detached sidewalk    3.   Urban 2/on-street parking not allowed with attached sidewalk    4.   Urban 2a/on-street parking not allowed with detached sidewalk    5.   Rural/on-street parking not allowed    6.   Cul-de-sac    7.   Local half street	44 50 38 44 40 # 30
Minor collector	60
Major collector	80
Minor arterial	110
Principal arterial	140
Expressway	300
Minimum Pavement Width (back of curb to back of curb)
Alley	20
Local streets    1.   Urban 1 & 1a    2.   Urban 2 & 2a    3.   Rural    4.   Cul-de-sac	32 26 24 ##
Minor collector streets	36
Major collector streets	50
Minor arterial streets	76
Principal arterial streets	104
Expressway	138
Design Speed
Local - 25 mph	-
Minor collector - 35 mph	-
Minor arterial - 45 mph	-
Principal arterial - 55 mph	-
Expressway - 75 mph	-
Minimum Curve Radius
All local streets	150
All collector streets	400
Minor arterial	575
Principal arterial	750
Minimum Lengths of Tangents Between Reverse Curves**
Local, alleys two lanes	150
All collectors with two lanes	300
Minor arterial	270
Principal arterial (four lanes)	280
Minimum Sight Distance
Street - street intersection	40
Street - driveway intersection	15
Cul-de-sac
Right-of-way diameter	107
Pavement diameter	96
Center island diameter (if required)	30
Maximum length	600
Curb Radii (from back of curb)
Local half street	20
Local	20
All collectors	30
Major arterial	50
Minor arterial	50
* Will require a minimum ten-foot utility easement outside ROW on each side of street. ** Length may be reduced with curves of radii of 1,000 feet or greater. # Right-of-width as required by Section 15.32.090 with a terminus roadway radius of 53.5 feet ## Pavement width as required by Section 15.32.110 with a terminus roadway radius of 48 feet