[Ord. 311, 8/20/2012, § I]
See Lower Heidelberg Township Standard Detail LHT-12. The applicant
shall be required to comply with Detail LHT-12.
[Ord. 311, 8/20/2012, § I]
See Lower Heidelberg Township Standard Detail LHT-12. The applicant
shall be required to comply with Detail LHT-12.
[Ord. 311, 8/20/2012, § I]
(a) Whenever street lines are deflected in excess of five degrees connection
shall be made by horizontal curves.
(b) Minimum sight distance shall be provided as follows:
|
Design Speed
(in miles per hour)
|
Minimum Sight Distance
(in feet)
|
---|
|
20
|
150
|
|
25
|
175
|
|
30
|
200
|
|
35
|
240
|
|
40
|
275
|
|
45
|
320
|
|
50
|
350
|
|
55
|
425
|
(c) Minimum center-line radii for horizontal curves shall be as follows,
provided that the Township may permit smaller center-line radii when
the subdivider substantiates that the minimum sight distance required
by § 803(b) will be provided.
|
Design Speed
(in miles per hour)
|
Minimum Center Line Radius
(in feet)
|
---|
|
20
|
100
|
|
25
|
150
|
|
30
|
230
|
|
35
|
310
|
|
40
|
430
|
|
45
|
550
|
|
50
|
700
|
|
55
|
850
|
(d) A straight section of road of at least 100 feet shall be introduced
between all horizontal curves on collector streets and of at least
200 feet between horizontal curves on arterial streets.
(e) Combinations of the minimum radius and maximum grade shall be avoided.
[Ord. 311, 8/20/2012, § I]
(a) At all changes in street grades where the algebraic difference in
grade exceeds 1%, vertical curves shall be provided. The minimum sight
distance provided shall be as follows for both crest and sag vertical
curves.
|
Design Speed
(in miles per hour)
|
Minimum Sight Distance
(in feet)
|
---|
|
20
|
150
|
|
25
|
175
|
|
30
|
200
|
|
35
|
250
|
|
40
|
300
|
|
45
|
375
|
|
50
|
450
|
|
55
|
550
|
[Ord. 311, 8/20/2012, § I]
(a) Streets shall intersect as nearly as possible at right angles, and
no street shall intersect another at an angle of less than 75°,
or more than 105°. The angle of intersection with arterial streets
shall be 90°.
(b) No more than two streets shall intersect at the same point.
(c) Streets intersecting another street shall either intersect directly
opposite to each other or shall be separated by at least 150 feet
between center lines, measured along the center line of the street
being intersected.
(d) On all streets which require stopping, intersections shall be approached
by a straight leveling area, the grade of which shall not exceed 5%
within 50 feet of the intersection of the nearest right-of-way lines.
(e) Intersections with arterial streets shall be located not less than
1,000 feet apart, measured from center line to center line, along
the center line of the arterial street.
(f) Street curb intersections shall be rounded by a tangential arc with
a minimum radius of:
(1)
For intersections involving only minor streets or alleys: 20
feet.
(2)
For all intersections involving a collector street: 30 feet.
(3)
For all intersections involving an arterial street: 40 feet.
[Ord. 311, 8/20/2012, § I]
(a) Clear-sight triangles shall be provided at all street intersections.
Within such triangles, no vision-obstructing object shall be permitted
which obscures vision above the height of 30 inches and below 10 feet
measured from the center line grade of intersecting streets. Such
triangles shall be established from a distance of 75 feet from the
point of intersection of the center lines, except that clear-sight
triangles of 150 feet shall be provided for all intersections with
arterial streets.
(b) Wherever a required portion of the line of such clear-sight triangles
occurs behind the building setback line, that portion shall be considered
a building setback line.
(c) Sight distance at street intersections shall be such to provide the
following minimum stopping distance for a vehicle traveling on an
approaching street which has no stop or signal control:
|
Design Speed of Approaching Street With No Stop or Signal
Control
(in miles per hour)
|
Minimum Stopping Distance Required Unless Alternative
Permitted by Township
(in feet)
|
Alternative Stopping Distance Permissible at Discretion
of Township Only on Lightly Traveled Highways Where Removal of Sight
Obstructions Would Be Costly
(in feet)
|
---|
|
20
|
150
|
90
|
|
25
|
175
|
110
|
|
30
|
200
|
130
|
|
35
|
240
|
155
|
|
40
|
275
|
180
|
|
45
|
320
|
200
|
|
50
|
350
|
220
|
|
55
|
425
|
240
|
(d) Street intersections shall be located and designed to provide the
following minimum sight distance for a vehicle traveling on an approaching
street which has a stop control:
|
Design Speed of Street Being Approached by Vehicle on
Stop Control Street
(in miles per hour)
|
Minimum Sight Distance Required
(in feet)
|
---|
|
20
|
200
|
|
25
|
250
|
|
30
|
300
|
|
35
|
350
|
|
40
|
400
|
|
45
|
450
|
|
50
|
500
|
|
55
|
550
|
(e) For calculating sight distance as required by § 806(c),
refer to "A Policy on Geometric Design of Highways and Streets," AASHTO,
latest revision.