http://www.fws.gov/policy/362fw3_files/image001.gif

Exhibit 1, 362 FW 2
Factors for Evaluating the Need for Bridge Barrier Systems

Supersedes Exhibit 1, 362 FW 2, FWM 375, 09/21/01

Date:  September 28, 2010

Series: Engineering and Construction

Part 362: Bridge Safety

Originating Office: Division of Engineering

 

 

PDF Version


 

Consider the following factors when evaluating the need for any component of a bridge barrier system. (The factors are not in any particular order.)

A. Accident history at the site.

B. Vehicle speeds approaching and across the bridge.

C. Average daily traffic and average daily truck traffic.

D. One-way versus two-way traffic.

E. Bridge surface (i.e. slippery vs. non-slippery).

F. Approach roadway alignment.

G. Approach roadway width vs. bridge width.

H. Approach roadway surface.

I. Approach sight distance and sight distance across the bridge.

J. Approach roadway embankment slope.

K. Bridge geometry including width, length, and deck cross-section (flat vs. crown).

L. Typical weather conditions such as snow and ice, frequent fog, rain, and runoff.

M. Nighttime use.

N. Familiarity of users with the bridge.

O. Bridge height over waterway (or other feature crossed).

P. Depth of water below bridge.

Q. Operational concerns of the facility.

R. Aesthetic concerns.

S. Pedestrian use.

T. Projected future use of the bridge.

 


For information on the content of this exhibit, contact the Division of Engineering. For more information about this Web site, contact Krista_Bibb, in the Division of Policy and Directives Management.  



Directives Home

PDM Web sites: Centralized Library of Servicewide Policies | FWS Forms | PDM Services

Privacy, Disclaimer and Copyright Information | Information Quality Act

U.S. Fish and Wildlife Service Home Page | Department of the Interior  | USA.gov  | About the U.S. Fish and Wildlife Service  | Accessibility  | Privacy  | Notices  | Disclaimer  | FOIA