Part 2 — Unified Development Ordinance Subdivision Regulations
City of Andover Unified Development Manual

5. Overview of Design Standards by Street Classification.
Width (in feet) ROW Roadway
Street Classification
Curb and Gutter
Construction Method
Drainage Improvements*
Sidewalks
Parking
Local Streets
>1000 feet long >500 and <1000 feet long ≤ 500 feet long
64
35
5' concrete sidewalk on 1 side of through & loop streets
7" asphaltic concrete over 6" of 95% compacted earth stabilized with fly ash
curbs must not be overtopped by 2-year initial design storm
permitted on both sides
standard or roll
60
31
58
29
Collector Streets Class A (commercial/ industrial)
one 8-foot lane width remains free of encroachment by 5-year initial design storm
70
41
standard 8" asphaltic concrete over 6" rock base
8' concrete sidewalk on 1 side
permitted on both sides
8" asphaltic concrete over 6" of 95% compacted earth stabilized with fly ash
Class B (residential)
66
37
standard
Arterial Streets Class A
49
10' concrete sidewalk/bicycle path on 1 side. Optional 5' concrete sidewalk on the other side.
(4 lanes, C&G) Class B (3 lanes, C&G) Class C (2 lanes, C&G)
one 8-foot lane width in each direction remains free of encroachment by 5-year initial design storm
39
standard
prohibited on both sides
100' minimum typical
as required
31
C&G not required; 3' shoulders
Class D (no C&G)
28
None.
* Retain 1% annual chance flood within right-of-way, drainage easement, or dedicated greenspace reserve.
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Foster Design Associates LLC
Design Standards
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