Township
| ||
---|---|---|
Base Course
|
Paved Surface
| |
6" 2A Stone, Superpave Base Course, PG 64-22, 0.0/0.3 ESALs,
4" of 25.0 mm mix and 2" of 19.0 mm mix
|
Superpave Wearing Course, PG 64-22, 0.0/0.3 ESALs 1.5" of 9.5
mm mix
|
*
|
Note: All depths in the table above represent compacted depths
of material.
|
Street Classification
|
Minimum Cartway Width
|
Minimum Right-of-Way Width
| |
---|---|---|---|
Arterial street (highway)
|
As determined after discussion with the Township, PennDOT, and
the Lancaster County Planning Commission, however the minimums shall
be as follows:
| ||
40 feet
|
60 feet
| ||
Collector street, curbed, no parking
|
36 feet
|
50 feet
| |
Cul-de-sac bulb
|
80 foot diameter
|
100 foot diameter
| |
Alley, no parking
|
12 feet
|
20 feet (easement)
|
Travel Lane Width as determined by ADT
| |||||
---|---|---|---|---|---|
Miles Per Hour
|
Under 400 ADT
(feet)
|
401 to 1,500 ADT
(feet)
|
1,501 to 2,000 ADT
(feet)
|
Over 2,000 ADT
(feet)
| |
15
|
9
|
10
|
11
|
10
| |
20
|
9
|
10
|
12
|
11
| |
25
|
9
|
10
|
12
|
11
| |
30
|
9
|
10
|
12
|
11
| |
35
|
9
|
10
|
12
|
11
| |
40
|
9
|
10
|
12
|
11
| |
45
|
10
|
11
|
12
|
11
| |
50
|
10
|
11
|
12
|
11
| |
55
|
11
|
11
|
12
|
12
|
Design Speed
(miles per hour)
|
"K"
Crest Vertical Curves
|
"K"
Sag Vertical Curves
| |
---|---|---|---|
20
|
10
|
20
| |
25
|
20
|
30
| |
30
|
30
|
40
| |
35
|
45
|
50
| |
40
|
70
|
70
| |
45
|
100
|
90
| |
50
|
150
|
110
| |
55
|
220
|
130
|
Through Street Classification
|
Minimum Intersection Separation Distance
(feet)
| |
---|---|---|
Arterial
|
500
| |
Collector
|
300
| |
Local
|
200
|
SSSD = 1.47 Vt +
|
V2
30(f- G)
|
Where:
| ||||
SSSD
|
=
|
Minimum safe stopping sight distance (feet)
| ||
V
|
=
|
Velocity of vehicle (miles per hour)
| ||
t
|
=
|
Perception time of driver (2.5 seconds)
| ||
f
|
=
|
Wet friction of pavement (0.30)
| ||
G
|
=
|
Percent grade of roadway divided by 100
|
Number of Lanes
|
Cartway Width
(feet)
| |
---|---|---|
3
|
30
| |
2
|
20
| |
1
|
10
|
Acer rubrum cultivars
|
Red maple
|
Aesculus x cornea
|
Red horsechestnut
|
Cladrastus lutea
|
American yellowwood
|
Gleditsia triacanthos inermis Cultivars
|
Thornless honey locust
|
Liquidambar styraciflua
|
Sweet gum
|
Nyssa sylvatica
|
Black tupelo
|
Quercus acutissima
|
Sawtooth oak
|
Quercus rubra
|
Red oak
|
Tilia cordata
|
Littleleaf linden
|
Tilia x euchlora
|
Crimean linden
|
Tilia tomentosa
|
Silver linden
|
Zelkova serrata cultivar
|
Japanese zelkova
|