APPENDIX_5_-_Traffic_Control_Standards.pdf

MACDILL AFB

19 MAY 2003

REVISION 2

TRAFFIC CONTROL

STANDARDS

6th AIR MOBILITY WING

CROSSWALKS

There are two standard types of crosswalks currently in use at MacDill Air Force Base.

Type 1 -Pictured to the left.

This crosswalk is used exclusively in high visibility areas.

It consists of an 8-foot wide red brick crosswalk with 12-inches wide concrete strips on either side. The brick color will be a Hollandale Red/Tan or equivalent laid in a basket weave pattern.

The foundation material for this crosswalk will be a

1-inches thick sand base over 12-inches of crushed concrete or 6-inches of Portland cement concrete. The individual bricks will have sand filler between the brick.

The concrete border strips (10-inches thick by 12-inches wide will be constructed on a crushed concrete base.

Adjustments in the base thickness or border strip thickness may be required to adjust for traffic volume.

CROSSWALKS

Type 2 Crosswalk

This is a standard crosswalk to be used throughout the base. This crosswalk will be in accordance with the

Manual on Uniform Traffic Control Devices (MUTCD), Part 3b-18.

Crosswalks will consist of 12-inch wide bars spaced 48-inches apart from outside edge to outside edge. Side bars will be 12-inches wide and spaced 6-feet apart from outside edge to outside edge. Crosswalks will be made of white reflective thermoplastic material.

CURBS

There are four standard types of curbs used at MacDill

AFB.

Specifications for curbing will be according to the current

Base Pavements Contract. All curbing will be reinforced per the project specifications.

Pictured to the left is a schematic of a Type 1 curb. Type 1 curb will be constructed to Florida Department of

Transportation (FDOT),”Roadway and Traffic Design

Standards”.

A Type 1 curb is pictured on this page. This curb is used in the historic areas of the base and is used to match existing curbing in these locations.

A Type 2 curb is pictured on this page.

Type 2 curbs will be constructed per FDOT Roadway and

Traffic Design Standards, Type F curb.

Pictured to the left is a schematic of a Type 2 curb.

Type 2 curb. Longitudinal view.

Type 3 curbs will be constructed per FDOT Roadway and

Traffic Design Standards, FDOT Drop Curb.

Pictured to the left is a schematic of a Type 3 curb.

Type 3 curbs are used at driveways or in residential areas.

A type 3 curb is pictured on this page.

A Type 4 curb is pictured on this page.

Type 4 curbs will be constructed per FDOT Roadway and

Traffic Design Standards, Type E FDOT Standard Curb.

Pictured to the left is a schematic of a Type 4 curb.

A Type 4 curb is typically used in the median of a divided roadway.

SIGNS

REGULATORY INFORMATION AND STREET

SIGNS:

Regulatory signs will be mounted to a uniform height of 7-feet to the bottom of the sign, per the Manual on Uniform

Traffic Control Devices (MUTCD).

As pictured to the left, information signs will be mounted below regulatory signs.

Signposts will be Qwik-punch 2-inches square steel posts with rain cap. Posts will be hot-dip galvanized, with an architectural brown anodized baked enamel finish.

(UNISTRUT PART NO. 20 DIZP-10-QP)

Signs will be installed using 36-inches break-away with 12 gauge anchor sleeve. All signposts will be installed in concrete footings.

Sign fronts will be aluminum panes with baked enamel finish.

SIGNS

Sign backs will be black vinyl as shown at left. Sign backings will be pre-coated pressure sensitive adhesive or tack-free heat activated adhesive.

Street signs will be mounted at 7-feet to the bottom of sign unless mounted on top of a regulatory sign as shown at the left. All new signs shall be made with a decal made of

Engineer Grade reflective sheeting to prevent peeling.

Decals will be in color as shown.

Signs will be aluminum panes with baked enamel finish front.

Signposts and backs will be identical to regulatory signs.

ROADWAY MARKINGS

As shown at the left, stop bars will be utilized at intersections in addition to stop signs

Stop bars will extend from the center of either the single or double yellow line to the roadway edge and will be located on the intersection side of the stop sign.

Stop bars will be fabricated using white thermoplastic paint and be 24-inches wide in accordance with the

MUTCD.

ROADWAY MARKINGS

Roadway centerlines will be yellow thermoplastic as shown at the left, unless approval is granted for an alternate type of marking by the Pavements Engineer. In

“No Passing” zones, double solid yellow lines are required.

Roadway edge lines will be solid white 6-inches wide reflective painted lines.

Lines dividing two lanes of traffic in the same direction will be white thermoplastic dotted lines in accordance with the MUTCD.

Shown at the left are examples of directional arrows used to control traffic entering intersections. Directional arrows must be white reflective thermoplastic and in accordance with MUTCD standards.

PARKING LOTS

Parking area designs will be reviewed by the Pavements

Engineer to ensure they meet the established standards for these facilities. The Pavements Engineer will review the design for: Type and strength of materials. Functionality and traffic flow. Handicap accessibility and appearance as related to base standards, environmental permit approvals, and safety.

Markings in parking lots will be white. Spaces will be delineated with 5-inches wide lines. Arrows and stop bars will be applied to the pavement using reflective white thermoplastic, and will be used where appropriate.

Painted, non-reflective lines will be used in parking lots except for arrows and stop bars.

Parking lots will include lighting if used during hours of darkness. Lighting shall be both functional and architecturally compatible with the surrounding area.

Lighting and light poles will be approved by the Base

Electrical Engineer and by the Base Architect.

Parking lots will normally include sidewalks to provide all weather access to the parking. Lots will have handicap access and will have reserved spaces for handicapped drivers.

Parking areas will normally be curbed to control drainage and to provide a positive stop for vehicle wheels. The use of bumper blocks in parking lots is not permitted. All environmental permit requirements must be satisfied prior to initiating construction on new parking areas.

Parking on MacDill AFB will be constructed to blend with surrounding areas. A conscious effort will be made to avoid a "sea of asphalt" effect.

Landscaping plants will be compatible with other plantings on MacDill AFB. Automatic sprinkler systems must be provided in areas where grass or plants require regular watering.

For MacDill AFB, the normal lane width in parking lots is

24-feet for 90 degree parking spaces. The normal dimensions of the individual parking spaces are 19-feet x

9-feet. Consult ARCHITECTURAL GRAPHICS

STANDARDS, Chapter 1, “Automobiles, Roads and

Parking” for other acceptable lane widths and parking stall dimensions for specific lot configurations

Parking areas will use landscaping and green spaces within the parking area to “screen” vehicles from view. Sidewalk access will be provided where parking areas are detached from facilities.

HANDICAPPED ACCESSIBILTY

Handicap spaces will be identified by painted markings on the pavement as shown. Parking spaces will have a double

5-inch wide non-reflective white line on either side of the parking area. The “Chair” symbol will not be used nor will any blue markings be used. The handicapped sign will have a brown background with white letters. It will be mounted on the Vinyl coated Unistrut 2”x2” pole approved for MacDill AFB. Signs backs will be black vinyl.

Another example.

HANDICAPPED ACCESSIBILTY

Handicap ramps must comply with the ADA guide requirements as well as FDOT Roadway and Traffic

Design Standards. These ramps are required whenever newly constructed sidewalks intersect roads or driveways.

Examples of acceptable handicap ramps are shown at the left.

Handicap ramps similar to that shown at the left help to provide better traction for pedestrians and handicapped persons alike.

ROADCUTS

Road cuts are to be used as a “last resort” and will be avoided whenever possible. Unless unusual circumstances dictate otherwise, horizontal boring will be used to cross roadways without damaging the roadway and marring its surface. Prior to any work of this sort, coordination will be made with the Pavements Engineer. The Pavements

Engineer will generally approve all requests for horizontal boring but will require the user to "show cause" why a road cut is necessary.

If a road cut is unavoidable, the Pavements Engineer will specify the repair materials, material densities and thicknesses to be employed in the repair.

Specifications for both road cuts and horizontal boring are in the Army Corps of Engineers Guide Specifications. A detail of a MacDill approved road cut repair is shown.

SIDEWALKS

Sidewalks will be employed where pedestrian traffic is likely. Sidewalks will provide handicap access where appropriate.

Normally sidewalks are 4-feet wide and 4-inches thick.

They may use wire mesh reinforced; fiber mesh reinforced or unreinforced concrete. Sidewalks which receive a high volume of pedestrian traffic may be 6-feet wide.

Sidewalks that are likely to receive vehicular traffic will be at least 6-inches thick to prevent breakage. Design mix for concrete will be approved by the Project Engineer.

MISCELLANEOUS

VALVE BOX DETAIL WITH DISK

DISKS SET IN CURB/SIDEWALK

Water and Gas valves on MacDill will be marked using a brass disk, which is depicted to the left. Valves, which lie in grassed areas, shall have a concrete pad around the valve box constructed to the dimensions shown. Valves, which lie in paved areas, are to have the disk placed in an adjacent curb. Disks mounted in existing curbs are to be fixed in place with epoxy.

Disks are to be 3-inches in diameter brass. The top line of printing will indicate whether the valve turns clockwise

(CW) or Counterclockwise (CCW) and how many turns.

The second line will provide the valve number, which can be obtained from the project engineer. The stamped lettering will be at least ¼-inches high block letters.