Wis. Admin. Code Department of Transportation § Trans 204.03 - Town road standards

(1) The minimum design standards for each of the town road improvement levels are as shown in the following tables:

TABLE A-RECONSTRUCTION

TRAFFIC VOLUME

ROADWAY WIDTH DIMENSIONS IN FEET

Design Class

Current ADT

Design Speed MPH

Traveled Way

Shoulder

Roadway

T1

Under 250

40

20

3

26

T2

250-750

50

22

4

30

T3

Over 750

55

24

6

36

TABLE B RESURFACING AND RE CONDINIONING

TRAFFIC VOLUME

ROADWAY WIDTH DIMENSIONS IN FEET

Design Class

Current ADT

Design Speed MPH

Traveled Way

Shoulder

Roadway

TR1

Under 250

-

18

2

22

TR2

250 -400

40

20

2

24

TR3

401 -750

50

22

2

26

TR4

Over 750

55

22

4

30

Note: Examples of resurfacing and reconditioning improvements which may be appropriate for existing town roads include, but are not limited to, pavement rehabilitation; widening lanes and shoulders; replacing bridge elements to correct structural deficiencies; bridge deck overlays; bridge and culvert replacement; and other related improvements such as minor grading, subgrade work and correction of drainage problems.

(2) The geometry of the town road shall be designed to safely accommodate vehicles traveling at the design speed selected for the road improvement.
(3) The minimum design standards for existing town bridges are as shown in the following table:

TABLE C- EXISTING BRIDGES

CURRENT TRAFFIC VOLUME ADT

USABLE BRIDGE WIDTH

Under 400

Traveled way

400 - 750

Traveled way plus 1 foot each side

Over 750

Traveled way plus 2 feet each side

(4) Bridge replacement, rehabilitation or widening is required where a bridge is either load posted or has a usable width that is less than the traveled way width. Bridge replacement or widening should be evaluated if the usable bridge width is less than the values shown in Table C. If widening of the traveled way is planned as part of the town road improvement, the usable bridge width should be compared to the approaches after they are widened to determine whether or not bridge replacement or widening should be evaluated.
(5) The minimum design standards for new bridges on town roads are as shown in ch. Trans 214.

Notes

Wis. Admin. Code Department of Transportation § Trans 204.03
Cr. Register, September, 1992, No. 441, eff. 10-1-92.

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