Sidewalks
Right of Way
Ditches
Curb and Gutter
Ponds
100

The maximum allowable cross slope for an accessible sidewalk.

What is 2%?

100

The standard suburban right-of-way width for open ditch subdivision in Montgomery County.

What is 60'?

100

The minimum invert longitudinal slope of a roadside ditch in Montgomery County.

What is 0.1%?

100

The mimimum gradient of gutters in Montgomery County.

What is 0.3%??

100

The maximum side slope for a detention structure in Montgomery County.

What is 4:1?
200

If a walkway has a running slope steeper than this percentage, it is considered a ramp and must comply with additional standards, such as handrails.

What is 5%?

200

The standard suburban right-of-way width for curb and gutter subdivision in Montgomery County.

What is 50'?

200

The minimum vegetated side slope of the front slope of a roadside ditch in Montgomery County.

What is 4:1?

200

The maximum allowable distance in one direction for all paved curb and gutter streets with dedicated right of way in Montgomery County..

What is 700'?

200

The minimum maintenance access of a detention structure in Montgomery County.

What is 20'?

300

The maximum vertical change in level allowed in a sidewalk without it being considered a trip hazard or requiring a bevel.

What is 1/4"?

300
The minimum centerline radius for a suburban road in Montgomery County.

What is 300'?

300

At this bottom width, a small channel becomes a large channel in Montgomery County.

What is a 6' bottom width?

300

The minimum grade along the gutter in a cul-de-sac in Montgomery County.

What is 0.60%?

300

The minimum flow line slope of a concrete pilot channel in Montgomery County.

What is 0.05%?
400

The minimum clear width required for an ADA-compliant sidewalk.

What is 36"?

400

The minimum tangent between points of reverse curvature in Montgomery County.

What is 50'?

400

The freeboard required on all ditches and channels except for swales in Montgomery County.

What is 6"?

400

The curb height for all Islands, esplanades within right of way and reserves located on residential streets.

What is 6"?

400

The minimum depth of a wet bottom detention structure.

What is 6'?

500

The maximum allowable running slope for a curb ramp.

What is 8.33% (or 1:12)?

500

The minimum centerline offset between streets in Montgomery County.

What is 125'?

500

The maximum depth of a ditch without guardrailing in Montgomery County.

What is 4'?

500

The minimum pavement width for a local road with 32 or less lots in Montgomery County.

What is 25'?

500

The minimum allowable diameter of an detention structure outfall pipe.

What is 18"?