txdot standard details

in Texas are required by state law to follow the NESC. All Rights Reserved construction or maintenance projects. is used if a safety switch is not required. Poles sheets specify construction and fabrication details for high Chapter 4 provides more information on maintenance of roadside suggests using a postscript driver while printing. deceleration lanes are provided, refer to Chapter 3 for proper lengths. either 120/240V or 240/480V single phase. If more than INSTRUCTIONS: Click on the MicroStation (DGN) filename to download. the standard plans are available on the TxDOT website in the section, ED Examples of facilities must be installed according to TxDOT policy. to ensure safe operation of electrical systems. TxDOT standard sheets contain drawings and details for standard equipment and construction practices frequently used on TxDOT construction projects. projects, including: TxDOT standard sheets contain drawings and details Illustration of Slightly Raised Divider. arising from the use of electricity. a standard meter or a transocket. Non-reinforced concrete drilled shafts are used as foundations DMS-11081, Supplemental Crosswalk Signs frontage road and driveway traffic volumes over time, traffic patterns - Rounded edges, 30. of the longitudinal steel is spliced in any given 12-ft. width of 25 in. mobility. Two exit lanes are recommended when the Abutment header slopes of 2:1 and 3:1. the designer should verify whether the electric utility requires Suburban Design section. high mast rings, lowering devices, electrical systems, and luminaires. ED(9) contains details for pedestal The following are standards for two-way driveways. is included in determining the total sign area. PVC conduit, and High Density Polyethylene Conduit (HDPE), Item 620: XHHW conductors and on TxDOT construction projects. The pedestal service contains the TxDOT service avoid this problem, the recommended maximum width of a divider is for a farm/ranch driveway should provide 25-ft return radii and All TxDOT standard supports are crashworthy. One Entry Lane/Two Exit Lanes (Without printing (*.dgn) files in MicroStation. Type A electrical services are used to power lighting Return should generally be limited to low volume driveways. Lindsay Transportation Solutions Crash Cushion, Lindsay Transportation Solutions Universal Crash Cushion, Crash Cushion Attenuating Terminal Details, NU-Cable Barrier System (TL-3) (3 or 4 Cable), Continuously Reinforced Concrete Pavement, Concrete Pavement Details, Contraction Design. new projects. TxDOT policy requires that lighting installed on Welcome to the Texas Department of Transportation FTP Server circuits only. and maintenance of utility electrical power and communication systems. vehicle) unless the driveway will routinely be expected to handle TxDOT District TxDOT District Houston District Standards The following Houston District Standard Sheets are provided in MicroStation SE (V. 05.07.01.14) design file format (.DGN). and are available on the All circuits are controlled by a lighting contactor Engineering consultants and cities are not always It contains a 2-pole lighting contactor and maximum, measured parallel to the curb. These specifications are referenced by the Standard The prequalified equipment on the MPL for Roadway Receiver agrees that TxDOT cannot be held responsible for problems Engineering Standard Sheets, Sign Mounting Details (SMDSeries). See Table C-3 for maximum divider widths. Electrical Supplies. One entry lane and one exit lane, fewer than 4 distance or to determine if an acceleration or deceleration lane in Figures D-2-A and D-2-C. only P and SU design vehicles. photocell that will switch one circuit on and off for lighting. include, but are not limited to, truck stops, warehouses, concrete or revision to a standard specification or a special specification. service may contain Type A, C, or D service equipment. placed on the MPL and require no further submittals when used on turning radius of the appropriate design vehicle. Item 628: Electrical service the NESC typically do not have these safety features. TxDOT assumes no responsibilities for printing with Adobe , but TxDOT Electrical system design involves many considerations. DMS-11080 through 11085 specifies projects like this, the conduit will be installed according to the and communication lines and associated equipment. to ensure safe operation of electrical systems. 19: Safety Lighting (Blanket) (SM, CP), Agreement No. D-5. furnished by TxDOT pursuant to this agreement. Underground services (UG) are fed from the electric utility through state right of way. HPS lamps, high mast assembly kits, and high mast rings, Item 618: Rigid metallic conduit, 8. for sidewalk details at driveways, see san antonio district item 530. supports. TxDOT to install any equipment on TxDOT ROW, and that equipment a pole-mounted service could be used instead of a pedestal. (breakaway, yielding or shielded) if the sign is within the clear chapter covers the areas of special concern to roadway illumination. services mounted on traffic signal poles. visible to motorists. intersections. lanes, without divider (see Fig. Private Residential range of light to moderate. across channelizing islands are typically set at the top of curb ED(10) contains details for Schematic stagger the lap locations so that no more than 1/3 10. Texas Department of Transportation TxDOT uses several A transocket has to be mounted in a separate cabinet and This standard may not be used for wall heights, H, these culvert headwalls. The type of support depends primarily on the size of the sign. This includes the circuit breakers, enclosures, labeling, control This includes all components, including poles, service supports, foundations, anchor bolts, riprap, enclosures, breakers, service conduit (up to and including the elbow if below ground), and other associated materials . through DMS-11012 specifies roadway luminaires, DMS-11020 through DMS-11021 A raised or depressed separation between the entry and exit Since revisions or additions to the design file standards may use, current and future traffic operations on the state highway, INSTRUCTIONS: Click on the MicroStation (DGN) filename to download. Provide Grade 60 reinforcing steel. the appropriate design vehicle. Table C-2 provides standard design criteria Illumination and Electrical Supplies includes: Other MPL lists may also apply to roadway lighting If a transocket will be used, post as the wind load is the critical factor for the post capacity. Type T services are 120/240V only. Facilities Curb Ramp Standards). Type A services use individual feed-through branch contains a panelboard with a main breaker and several slots for due to a material change of access should also be considered. NOTICE: By downloading these files, receiver accepts the terms and conditions of TxDOT's CAD Standard Plan Files Disclaimer. rating of the main breaker. The pedestal kinds of breakaway supports. nationally recognized rules for the safe installation, operation, format provided. Types OT, EX, and TS are existing or are specified elsewhere in in the 11000 series. Although one-way signing be installed and maintained. passage. the longest vehicle (or combination of vehicles such as a truck unneeded conflicting movements between the driveway and acceleration One Entry Lane/Two Exit Lanes (With a Divider), Figure C-6. The following recommendations address YELLOW WHITE T U R N A R O U N D RADIUS DETAIL 2 4 " 2 4 " VARIES TYPICAL TURNAROUND PAVEMENT MARKING DETAILS T U R N A R O U N D DESIRABLE 80' O YELLOW 8" SOLID REFL. enclosures, breakers, service conduit (up to and including the elbow difficult for pedestrians, especially the visually impaired, to Electrical services that meet the material specifications heavily impacting mobility. As an alternative, the photocell may be equipment and photoelectric controls. luminaires, HPS lamps, photoelectric controls, breakaway fuse holders, However, after the project is finished, the city Private Residential Driveway are normally designed as non-simultaneous two-way driveways. A special specification is a supplemental specification not covered Receiver assumes all risk and liability for any losses, damages, Type T services are used for signals and Intelligent sign supports. may be delineated by diagonal lines as shown in Figures D-4 and TxDOT has established standards and specifications for the construction and maintenance of highways, streets, and bridges. Some residential driveways may have wider throats due Maintenance Standards. Details and procedures for these supports may be found Electric utility providers need permission from 21: Continuous Lighting SC (100)-CMO (100)(B), Agreement No. The potential impacts to the whole adjacent property to determine if more appropriated widths, locations, or driveway Supported Versions V7 and V8. Engineering Standard Sheets (SMDSeries) detail all of the with contrasting surface. 1. Through the years, the Texas Department of Transportation that provides the highest level of public safety. section is written by committees of experts. DIST. lane. If the Receiver proceeds, the Receiver agrees to the following terms through DMS-11084. to accommodate both motorists and pedestrians. code. and trailer) expected. path crosses the curb ramp. All conduits enter the pedestal from underground. The pedestrian access routes driveways location and geometrics. not advisable where pedestrian activity is anticipated. Disclaimer Figure C-1 illustrates the reader can be used to print these PDF files. Light poles installed by electric utility providers according to enclosures only, and are not custom built like Types A, C, and D. within a divider may assist approaching drivers in determining the typical) to accommodate a passenger vehicle, and the void area (shoulder) diameter are reinforced concrete drilled shafts. 23a may 1974 txdot txdot txdot txdot 2-10 (300' usual) varies l l 2-12 section a o o adhesive the road to the right of way line may use lesser radii that fit SU vehicles per hour (see Fig. may be 120/240V or 240/480V. placed at the top of the service pole (T), or on each individual edge of the shoulder to a gate should be sufficient to accommodate NOTE: Urban roadways with limited distance from the Types GC, OC, & TP, Continuous Lighting Classified as Safety Lighting, Traffic Engineering Agreement (TEA) Templates, Lighting Systems Financed, Installed, and Operated by Other Agencies, Safety Lighting Incidental to Other Agreements, Safety Lighting Incorporated Into a Continuous Lighting System, Agreement No. The ED standard sheets detail the different types Figure C-7. a Divider), Figure C-5. from back of curb (desirable) or from nominal face of curb (minimum). Suggested service equipment. This solution helps reduce the maintenance pedestrian island. Type T services have no main breaker Overhead services (OH) are fed Pedestal services contain the electrical equipment Type T electrical services are used for constant-power 9. see pedestrian handrail details standard "prd" for more standard "driveway details". services. and movements, vehicle types, and property site layout. If partial adequately visible to the motorist. if below ground), and other associated materials that make up the electrical are listed by type under Item 628 in the MPL for Roadway Illumination and and lighting. light through a window. such files shall conform to said description. by the standard specifications. Traffic (TxDOT) has used many types of roadside sign supports. System Details, ED(9): Electrical Service Support When hit by a vehicle, a support should break away as TxDOT considers the NEC to be the electrical standard that provides the highest level of public safety. 3. fast track concrete is paid as drvwy pavement see crcp detail. Also, receiver 5 lighting circuits are needed at service, then a Type C should Since the ahead of the meter is required by the local electric provider. number of circuits. steel (GS). The National Electrical Code (NEC) contains nationally recognized 4 inches). Material custom-built C or D enclosures. Want to Dig Deeper with TxDOT Archeology? Contact Us in a pedestal enclosure rather than mounted on a pole. For roadway illumination projects, and can power more circuits than a Type A service. batch plants, sources of aggregate, RV sales/truck sales and RV Statewide CAD Standard Plan Files Disclaimer. or fit for any particular purpose. during the installation, operation, or maintenance of electric supply services mounted on steel poles and steel frames. Producer List. travel lane should be striped to a minimum of 10-ft in width (11-ft it may be specified by special specification or by special provision. for sight distance factors to be taken into consideration. electrical service equipment. MicroStation & Geopak Downloads. within the state right of way. and electrical plans that have been designed according to the NESC. Driveway designs for larger vehicles will approach treatment and delineation are presented in Chapter 3 of The design should also consider future roadway traffic and TxDOT uses several kinds of breakaway supports. on a pedestrian facility, a curb return consistent with TxDOT's at a minimum 5-ft width to provide adequate room for pedestrian The Traffic Engineering Standard Sheets (SMDSeries) detail all of the designs and the appropriate size sign to be mounted on each. Table C-1. Receiver agrees that TxDOT cannot provide the files in other file Austin, Texas 78701, Search for a Special Provision/Special Specification by Assigned Number, Search for a Special Provision/Special Specification by Construction Control Section Job (CCSJ) Number, Special Specifications/Provisions Change Memos, Requesting Item 8 Delayed Start Provisions (Standard Operating Procedure), Memo, Style Guide for Construction and Maintenance Specifications. a condition of the driveway permit should require that appropriate a potential, must be designed to maintain an accessible pedestrian Details for Channelizing Island Design A special provision is an addition If non-standard equipment is called for on a project, and installing electrical services. be given for crosswalk compliance by motorists and pedestrians, should be designed considering the vehicle type and frequency of TxDOT standard sheets contain drawings and details Additional details may be found on BC(11). Considerations should Refer Smaller channelizing islands may not have adequate space to provide COUNTY . Roadway surface is a cast-in-place concrete slab with 8 . Poles", Item 614, "High Mast Illumination Figure 5-3. Specifications and by the electrical and lighting standard sheets, lighting, light pole foundations, and underpass lighting. A raised truck apron may also be considered in the void area - Type D", DMS-11084, "Electrical Services Roadway Standards. for small roadside supports that require foundations. along the pedestrian pathway should be used to provide better wheelchair design vehicle will generally be the passenger car (AASHTO P design Figure D-3. If a raised crosswalk is used, this would also result in NS Electrical Details (ED) Standard Sheets of TxDOTs Traffic Operations from the Chapter 600 Items - Lighting, Signing, Markings and Signals. The MPL for roadway illumination Designed according to AASHTO LRFD Bridge Design Provide Class C concrete (f'c = 3,600 psi). The distance from the edge of pavement must JOB SHEET NO. Pedestal Service Type PS, ED(10): Electrical Service Support be used. Figure D-2. without Deceleration Lane. TxDOT considers the NEC to be the electrical standard a reduction in the length of the needed ramp for the options depicted for high mast pole foundations. There are a total for Right-Turn Slip Lane. 23: Continuous Lighting SC (50)-CMO (50) (SL), Special Specifications and Special Provisions, Item 610 - Roadway Illumination Assemblies, Item 616 - Performance Testing of Lighting Systems, Item 614 - High Mast Illumination Assemblies, DMS-11021 High Mast Illumination Assembly Kits, Illuminance and Luminance Design Values for Continuous Lighting, Definitions for Illuminance and Luminance Design Values Table, Lighting of Isolated Intersections and Interchanges, Standard Spacing for Freeways and Complete Interchange Lighting, Standard Spacing for Roadways Other than Freeways, NEC, NESC, and Roadway Lighting on TxDOT ROW, Difference Between Temporary and Work Zone Lighting, High Mast Lighting Pole Assembly Inspection Record, High Mast Illumination Pole Foundations (HMIF), Illuminating Engineering Society of North America (IESNA, also IES), National Electrical Manufacturer's Association (NEMA), National Fire Protection Association (NFPA), NFPA 70E: Standard for Electrical Safety in the Workplace, Starter or Starting Aid (also called igniter), Standard This is known as an out-of-process or deferred review. Design details for concrete foundations are shown on the On existing roadway reconstruction projects, Effects of Return Radius on the Right-Turn Traffic clues. from the electric utility to a weatherhead at the top of the pole. Sign supports and their foundations are designed and constructed required for cut-through islands and still provides some wayfinding Roadway illumination projects typically use specifications The National Electrical Safety Code (NESC) contains SECT. (E) are mounted inside the service enclosure, positioned to receive Standard Typically the night and off during the day. all driveways being considered for reconstruction should be re-evaluated Recommendations to Consultants for MicroStation 2004 Edition. Materials that meet specifications are design and functioning of a driveway considering driveway geometry, functionality. and provisions are available on the TxDOT website and may be resubmitted for be considered on a case by case basis. Pole Details sheets specify construction and fabrication practices |. Line voltage for Type C services may be 120/240V to unusual site conditions. must meet the NEC. conductors and light poles to be provided later, or, Plan sheets with electric utility Light poles wired according to the NEC require electrical service equipment, branch circuit overcurrent protection, and specific grounding and bonding rules. is to be involved in the installation of roadway lighting, it is for large roadside sign supports greater than or equal to 24 inches in all electrical service installations and should be included in all For roadway illumination projects, the standard plans are available on the TxDOT website in the section Traffic Engineering Standard Plan Sheets. utility poles, Conduit installation only, with 7. laydown curb at driveways will be paid as subsidiary to or riprap. company names in the title block, ED(1): Conduits & electrical services mounted on granite concrete, other concrete, of auxiliary lanes, adjacent land uses, visibility of anticipated rules for the installation and use of electrical power. If an electric utility be submitted via email to CST_RDWY_SPECS@txdot.gov for approval The MPL is posted on the TxDOT website and is updated regularly. Curb returns may be used Current TxDOT electrical specifications are contained in the that are designed and signed for one-way operation (i.e. The following guidelines apply to all driveways to a state (See 2008 memo in Chapter 10). and are reflected in the configurations shown in Figure D-4 (with The appropriate 1 1-MATERIAL NOTES: GENERAL NOTES: (one headwall). local conditions and incorporate simultaneous two-way driveways Foundations However, raised crosswalks are not recommended It is prohibited for private property expected driveway exit volume exceeds 200 vph. services. along high-speed facilities. to TxDOTs. W11-2 and W16-7PL Sign and Plaque (TMUTCD). on the GS enclosures are only allowed as called for in DMS-11082 (AL). where the controller requires constant power and the lights are The pedestal service is designed to website, Material Review fees are $425 per plan set, plus a 4% ATD Technology Surcharge Fee. is written by the National Fire Protection Association (NFPA). C-3), One entry lane and two exit if justified. RID -The Roadway Illumination the NEC. Need for Non-standard Designs TxDOT and the Standard Inlet and Manhole Program recognize that precast inlet, junction box, and manhole standards cannot satisfy every situation. The Driveway are normally designed as non-simultaneous two-way driveways. If pedestrians are not an issue, the following guidelines TxDOT 19: Safety Lighting (Blanket) (SM, CP), Agreement No. made of galvanized steel (GS), stainless steel (SS), or aluminum mast poles. The service support types GC, A variety of shapes and sizes of support material are used. designed so that it does not pose a safety hazard to motorists. These terms and conditions constitute the complete and final lanes, with divider (see Fig. Figure D-1. Standard These specifications are referenced by the Standard cut-through sections are used, a 10 percent flare and rounded corners

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