[Added 10-10-2002 by Bill No. 8-02, effective 11-24-2002]
The Index of Arterial Highways shall be as follows:
|
Functional Class
|
Route Name or Number
|
Location in Allegany County
|
|---|---|---|
|
Principal arterial
|
168 (National Freeway)
|
Garrett County line to Washington County line
|
|
Route 220 North
|
Pennsylvania State line to I-68
| |
|
Major arterial
|
Route 36
|
Alternate Route 40 in LaVale to Route 135 at Westernport
|
|
Alternate Route 40
|
Garrett County line to Willow Brook Road
| |
|
Route 47
|
Route 36 at Barrellville to Pennsylvania State line
| |
|
Route 35
|
Route 36 at Corriganville to Pennsylvania State line
| |
|
Route 135
|
Garrett County line to Route 220 in McCoole
| |
|
Route 956
|
Route 220 at Pinto to West Virginia State line
| |
|
Route 51
|
I-68 in Cumberland to West Virginia State line
| |
|
Route 220 South
|
I-68 to West Virginia State line
| |
|
Minor arterial
|
Route 936
|
Route 36 at Midland to Alternate Route 40 in Frostburg
|
|
Route 55
|
Route 36 at Vale Summit to Alternate Route 40 in Clarysville
| |
|
Midlothian Road
|
I-68 to Alternate Route 40 in Frostburg
| |
|
Route 53 (Winchester Road)
|
Alternate Route 40 in LaVale Road to Route 220 in Cresaptown
| |
|
Route 658 (Vocke Road; Campground Road)
|
Alternate Route 40 in LaVale to Route 53 in LaVale
| |
|
Route 636 (Warrior Drive)
|
Route 53 to Route 220 in Cresaptown
| |
|
Route 144
|
I-68 at Naves Crossroads to I-68 at 15 Mile Creek
| |
|
Scenic Route 40
|
I-68 at 15 Mile Creek to Washington County line
| |
|
Route 639 (Willowbrook Road) Williams-Messick Roads
|
I-68 at Cumberland to Route 51
| |
|
Town Creek — Bear Hill Roads
|
Route 144 at Flintstone to Route 51 at Oldtown
| |
|
Old Route 220
|
Route 220 North at Smouses Mill Road to Route 144 at Naves Crossroad
|
A.
Plans. Plans for all roadways showing full plan and profile information
drawn to a scale no smaller than one inch equals 50 feet horizontal
and one inch equals 10 feet vertical shall be submitted for review
and approval of the County Roads Division. The plan shall show horizontal
and vertical curve data, roadway cross section and detail of drainage
facilities (including appropriate calculations).
B.
Right-of-way. Rights-of-way shall be as follows:
|
Type of Road
|
Feet
| |
|---|---|---|
|
Major collectors and arterials
|
60 minimum
| |
|
All other roads and streets
|
50
|
C.
Utilities. Utilities shall be set back outside of pavement and within
20 feet of outside edge of right-of-way.
D.
Drainage. The minimum shall be twelve-inch pipe for driveway entrance
and 15 inches for road crosspipes. Where a larger size pipe is necessary,
the size is to be approved by the County Engineer and other affected
agencies. All pipes shall be fitted with standard end sections or
riprap inlet and outlet protection (with geotextile fabric).
E.
Gradient. The maximum allowed on new roads shall be 12% for sections
of road up to 500 feet in length and less than fifteen-degree curve;
otherwise, maximum allowed gradient is 10%.
F.
Curve. Curves shall comply with AASHTO standards for local roads
and streets for 30 miles per hour design speed and 0.08 maximum superelevation
rate.
G.
Access. Driveway access is not to exceed 5% for a distance of 30
feet beyond the road shoulder.
H.
Roadway widths (two lanes-County roads). Roadway widths shall be
as follows:
[Added 10-10-2002 by Bill No. 8-02, effective 11-24-2002]
|
Specifications
| |||||
|---|---|---|---|---|---|
|
Paved Roadway
| |||||
|
County Highway Function Classification
|
With Curbing
(feet)
|
Without Curbing
(feet)
|
Shoulder Width1
(feet)
|
Subbase Width
(feet)
| |
|
Minor arterial
|
34
|
24
|
10
|
a
| |
|
Collector or industrial park road
|
34
|
24
|
10
|
a
| |
|
All other streets and roads with ADT greater than 400
|
26
|
20
|
6
|
a
| |
|
All other streets and roads with ADT less than or equal to 400
|
18-222
|
18-222
|
b
|
b
| |
|
NOTES:
| ||
|---|---|---|
|
ADT — Design Average Daily Traffic count as approved by
the County Engineer.
| ||
|
1
|
For roadways without curbing.
| |
|
2
|
Roadway width depends upon design speed and functional use per
AASHTO Standards.
| |
|
(a)
|
Paved width plus shoulder width plus six inches each side.
| |
|
(b)
|
Roadside clear zone determined per AASHTO Standards.
| |
I.
Road surface specifications. Specifications shall be as follows:
|
Type
|
Arterial and Major Collectors
|
All Others
| |
|---|---|---|---|
|
Subbase*
|
Compacted earth
|
Compacted earth
| |
|
Base course*
|
10 inches GASB stone
|
8 inches GASB stone
| |
|
Surface paving
|
4 inches bituminous in concrete two layers
|
3 inches bituminous concrete in two layers
| |
|
Curbing (no bituminous curbing allowed)
|
Poured in place concrete curb and gutter
|
Poured in place concrete curb and gutter or precast concrete
curb (if applicable)
|
|
NOTES:
| |
|---|---|
|
* Subbase and base material shall be compacted to 95% of optimum
density as determined by AASHTO Method T-180.
|
J.
Triple surface treatment specifications.
(1)
Triple surface treatment may only be utilized when surface treatment
portions of an existing County-maintained road are being upgraded
or extended for a major subdivision. All new roads taken into the
County-maintained system must have a bituminous concrete surface.
(2)
All quantities shall be in place per square yard, with materials
and construction methods to meet Maryland SHA specifications, as follows:
|
Layer
|
RS3K Emulsified Asphalt
(gallons per square yard)
|
Graded Stone
| |
|---|---|---|---|
|
1st
|
0.50
|
No. 54; 40 pounds per square yard
| |
|
2nd
|
0.30
|
No. 7; 25 pounds per square yard
| |
|
3rd
|
0.30
|
No. 8; 20 pounds per square yard
|
K.
Road construction appurtenances. The developer shall provide the
following road construction appurtenances where the same are deemed
necessary by the County Roads Division. (All materials and construction
methods shall meet Maryland SHA Specifications.)
M.
Minimum overhead clearance. Minimum overhead clearance shall be 18
feet for utilities, bridges or other obstructions.
N.
Residential driveway setback. Residential driveway setback shall
be 200 feet from intersection of arterials or major collectors.
[Amended 10-10-2002 by Bill No. 8-02; effective 11-24-2002]
O.
Driveway junctions. Driveway junctions shall match the grade of the
street for a distance equal to shoulder width, then no more than 5%
for a distance of 30 feet beyond the shoulder. Junctions should be
at a ninety-degree angle to highway or street.
P.
Additional standards:
(1)
All construction shall be inspected and approved by the County Engineer
or authorized representative, while construction is in process. Final
approval of construction must be made by the County Engineer prior
to actual acceptance of roads or streets for maintenance by the County.
(2)
Site specific conditions may result in modification of these requirements,
subject to the County Engineer's approval.
(3)
Industrial park access roads shall meet major collector standards.
(4)
Any bridges or large-size culvert pipes shall be subject to special
site specific design criteria which will be established by the County
Engineer.
See Allegany County Standard Specifications and Details for
Water and Sewer Construction, latest edition, as administered by the
Public Works Department, Utilities Division, or other public or private
utility provider, as appropriate.[1]
[1]
Editor's Note: Rights-of-way and easements are shown in §§ 390-19D(7)
and (8) and in 360-23B.
Recreation land standards shall be as follows:
|
Lot Size or Area per Unit
|
Percentage of Total Subdivision Area to be Dedicated for
Recreation
|
|---|---|
|
Above 10,000
|
None required
|
|
8,000 to 10,000
|
2.5%
|
|
6,000 to 8,000
|
5.0%
|
|
4,000 to 6,000
|
7.5%
|
|
4,000 or less
|
10.0%
|
