Month 20Xxproject Scoping Report PIN XXXX.XX

Month 20XXProject Scoping Report PIN XXXX.XX

Attachment 1 Critical Design Elements for Route __

Design Criteriafor Alternative(s)

Design Standards -The design standards used should be based on the project work type (see PDM App. 5, Table 5-1); different standards may apply to different feasible alternatives. The basis for applying the standardsto the project should be stated. Guidance on establishing standards is available in NYSDOT HDM Chapters 2, 4, or 7, and/or the NYSDOT Bridge Manual, Section 2 as applicable.

Critical Design Elements

The following exhibit identifies critical design elements applicable to new and reconstruction projects, 3R projects on interstates and other freeways, new and replacement bridge projects, bridge rehabilitation projects, and intersection improvement projects. Project types are listed in PDM App. 5, Table 5-1. For complex projects that encompass several highway types, several sets of design criteria that apply to different segments of the project may be required. Separate criteria should be developed and included for each feasible alternative (e.g., a project that has both 3R and reconstruction as feasible alternatives). Separate criteria must be provided when work is proposed on side-roads, ramps, intersections, and shared-use paths. For further guidance on establishing design criteria refer to HDM Chapters 2, 4 and 7 as appropriate.

In addition to establishing standard values, the existing and proposed values should be included in the table of Critical Design Elements. It is recommended that the table illustrated below be used. This exhibit is required for each feasible alternative. Design criteria for more than one ramp or more than one local road or similar may be listed in one table, where appropriate, to reduce the no. of tables.

Critical Design Elements for Route __
PIN: / X123.45 / NHS (Y/N): / Yes
Route No. & Name: / NY 5Columbia Tpk. / Functional Class: / Rural - Minor Arterial
Project Type: / (PDM App. 5, Table 5-1) / Design Classification: / Rural Arterial (HDM Exhibit 2-1)
% Trucks: / 7 / Terrain: / Level
ADT: / 5500 / Truck Access/Qualifying Hwy. / Neither
Element / Standard / Existing Condition / Proposed Condition
1 / Design Speed / 80 km/h1 / 40 mph posted
2 / Lane Width / 3.0 m minimum, 3.6 m maximum
Bridge Manual (BM) Sections 2.3.1 Table 2-1 and Appendix 2A. Table R & Table N
3 / Shoulder Width / 1.0 m minimum, 2.4 m Maximum,
BM Sections 2.3.1 Table 2-1, and App. 2A Table R & Table N
4 / Bridge Roadway Width / 2(3.0) + 2(1.0) = 8.0 m Min.
2(3.3) + 2(2.4) = 11.4 m Max.
BM Sections 2.3.1 Table 2-1, and App. 2A Table R & Table N
5 / Maximum Grade / 7%
HDM Section 2.7.3.1 E, Table 2-5
6 / Horizontal Curvature / 229 m (@ e = 8.0%)
HDM Section 2.7.3.1 F, Table 2-5
7 / Superelevation Rate / 8% Maximum
HDM Section 2.7.3.1 G
8 / Stopping Sight Distance / 130 m Minimum (Crest)
HDM Section 2.7.3.1 H, Table 2-5
130 m Minimum (Sag)
HDM Section 2.7.3.1 H, Appendix 5B
9 / Horizontal Clearance / 3.0 m without rail; Along rail, use larger of 1.2 m or actual shoulder width
HDM Section 2.7.3.1 l
10 / Vertical Clearance / 4.3 Minimum, Highway
4.5 m Desirable, Highway
5.05 m Minimum for Thru-Truss
BM Section 2.4
11 / Pavement Cross Slope / 1.5% Min. to 2% Max.
HDM Section 2.7.3.1 K
12 / Rollover / 4% between lanes; 8% at EOT;
(If shoulder drainage is a concern, and superelevation > 6%, may use 10% for outer 1.2 m of shoulder.
HDM Section3.2.5.1
13 / Structural Capacity / NYSDOT LRFD Specifications AASHTO HL-93 Live Load and NYSDOT Design Permit Vehicle
NYSDOT Standard Specifications AASHTO MS23 (HS25) Live Load
HDM-Section 2.7.3.1.M &BM Section 2.6.1
14 / Level of Service / Min. “B” – Rolling
Min. “C” – Mountainous
HDM-Section 2.7.5.2.N
15 / Control of Access / Fully controlled
HDM-Section 2.7.5.2.O
16 / Pedestrian Accommodation / 1.525 m Highway
1.7m Bridge
Complies with HDM Chapter 18 and ADAAG
17 / Median Width / 1.2 m minimum w/o left turn
3.6 m minimum
HDM-Section 2.7.2.1.O
(1) The Regional Traffic Engineerhas confirmed that the use of a Design Speed of 80 km/h is consistent with the anticipated off-peak 85th percentile speed within the range of functional class speeds for the terrain and volume. **Denotes non-standard feature.

1) Include a statement as in footnote 1 above.

2) Designer's notes: For curves flatter than the minimum radius, the radius and superelevation on each horizontal curve shall be correlated with the design speed in accordance with the appropriate e-max table (HDMExhibit 2-13 for e-max = 6% andExhibit 2-14 for e-max = 8%).