Deldot road design manual july 2008 highway drainage and stormwater management 63 stormwater quantity and quality management. Design methods are presented for evaluating rainfall and runoff magnitude, pavement drainage, gutter flow, inlet design, median and roadside ditch flow, structure design, and storm drain piping. The oklahoma department of transportation odot ensures that no person or groups of persons shall, on the grounds of race, color, sex, religion, national origin, age, disability, retaliation or genetic information, be excluded from participation in, be denied the benefits of, or be otherwise subjected to discrimination under any and all programs, services, or activities administered by odot. A roadway stormwater drainage system may be in place for several decades. According to old finnish road design guidelines the depth of. Guidance on the design of soakaways is given in nra hd 118 design of soakaways and on the design of grassed surface water channels in nra hd 119 grassed surface water channels for road runoff. Highway drainage design, highway drainage structures. Expensive as compared to rural area drainage works. The goal is a design that is the most costefficient while still satisfying the criterion described below. Rural road design, maintenance, and rehabitation guide. Surface drainage road crowning crowning provides a lowgrade fall enabling drainage from both sides of the centre of the road see figure 1. Highway design manual new york state department of. Roadway design florida department of transportation home.
Water falling on the road surface generally flows along the gutter to curbs or gutter inlets and from them to underground storm drains. Openroads designer is a comprehensive and fully functioned detailed design application for surveying, drainage, subsurface utilities, and roadway design that supersedes all capabilities previously delivered through inroads, geopak, mx. The roadways will be designed to meet a combination of the nwa and the aashto road design standards. The design and layout of drainage and sewerage systems should comply with the building regulations and water authority specification. Some topics listed, remain in the road design manual but are supplemented by discussions in the mdot drainage manual. The primary functions of the highway design manual hdm are to. When designing the total system, consider potential land use changes and initial system costs. It does not matter to the public, whom we serve, whether a pipe surcharges or a manhole floods, but rather that flooding causes nuisance, inconvenience, damage, or health and safety risks.
Obviously, the design of proper drainage relies on careful studies at site. Road surface and subsurface drainage design department of. Volume 11, section 4, part 1 hd 4409 assessment of implications of highways andor road projects on european sites including appropriate assessmentv. In general, to design road drainage system, it is commenced by plotting the. Chapter 8 highway drainage revision 91 limited revision. Methods andprocedures are given for the hydraulic design of storm drainage systems.
The rural road design, maintenance, and rehabilitation guide was developed to provide the counties of south dakota with an established, uniform set of guidelines for. Openroads civil design software for road networks bentley. Highway drainage design, structures and guidelines. Overview drainage systems are an important and integral consideration in the planning and design of road infrastructure. Drainage design guidelinespdf, 2mb nillumbik shire council. There are a variety of aspects that must be considered to provide an appropriate and economical drainage system on all road projects, irrespective of. Implementation of internal road drainage design and application. Coordinate ditch design with region hydraulics see design manual errata sheet for ditch depth and width changes, may.
In sweden the design depth of this type of ditch is 0. Culverts are metal, concrete, or plastic pipes set beneath the road surface to drain ditches. The road drainage manual guides planning, design, construction, maintenance and operation of road drainage structures and is a technical reference for queenslands hydraulic, road drainage, erosion, environmental and sediment control. Code of procedures for the planning and design of highway and road structures in south africa feb 2002 11. January 2020 roadway design bulletin 2020 drainage manual. Road drainage design has as its basic objective the reduction andor elimination of energy generated by flowing water. Michigan design manual road design supplement to chapter 4 sections in mdot drainage manual the following list includes sections moved from the road design manual to sections within the mdot drainage manual. Importance of road drainage it is recognised that a road requires a drainage system to deal with stormwater runoff. Freeboard is the vertical distance from the bottom of base course to the 10year storm water surface see the hydraulics manual for more information. The criteria used for drainage design are determined by the goj development and investment. Highway drainage is an important consideration in the design of many projects. The three components of adequate road or track drainage are surface, side and cross drainage.
The term drainage is defined in several different ways, including the process of removing surplus groundwater or surface waters by artificial means, the manner in which the waters of an area are removed, and the area from which waters are drained. The document is not intended to be a comprehensive design manual for drainage for all new roads but concentrates on the design, rehabilitation and maintenance. Chapter 4drainage section 4a1introduction to stormwater drainage system design page 2 of 2. Drainage design for national road schemes sustainable. Therefore, the drainage system becomes an important and integral consideration in the planning and design of road infrastructure. Therefore, as part of the study, a practical surface drainage guide was prepared for use with the small drainage areas typically en countered in highway design. Drainage design for national road schemes tii publications. Pdf the effects of poor drainage system on road pavement. Minimum pipe culvert sizes under main roadways are as follows. For overland flood paths along roads, the route of the flood water should be. This set of guidance note is published to include the latest rainfall data and considerations for climate change for the design of road pavement drainage to. Pdf roadway as part of land transportation is very important to actualize human. Drainage manual 6th edition addenda 1 changes to jan 20 web version. Roads will affect the natural surface and subsurface drainage pattern of a watershed or individual hillslope.
Reference should also be made to the sewers for adoption manual. Road drainage and the water environment page 111 11 road drainage and the water environment 11. This ditch type can be used where the sub grade is water permeable and the groundwater table is deeper than 1. Sometimes the drainage and strength layers are combined into one layer, referred to as a common or combined layer, which serves both functions. Revision of the drainage design manual in ethiopia. Procedures for the design of detention facilities are. These code sections include, but are not limited to, the following hydraulic design information. The drainage design was either labeled by hand on the red line set of prints or a computer printout providing the pipe sizes, flow line information, and box types was provided. Equally important, the drainage patterns and requirements should be observed during rainy periods, in order to obtain a realistic impression of the. Certain design practices, such as use of rolling dips, outsloped roads, or lowwater stream cross. Drainage of surface water within road reserves collection, conveyance and treatment of runoff from roads. Road drainage manual, transport and main roads, september 2019 i. The citys drainage requirements are outlined in code sections 1235 and 124f. Wsdot design manual 2017 exhibit 12394 drainage ditch details.
It was then the responsibility of the engineer in road design to. Road drainage manual department of transport and main roads. In considering a costefficient drainage design, the initial cost should be considered, but facility longevity and future maintenance costs and legal and environmental constraints should. Road and drainage standards drawing name title pdf page. The following information is provided only as a general guide to good practice for the design of underground drainage systems. The major system consists of overland routes such as roads, drainage reserves, parklands etc. This training module provides comprehensive and detailed learning materials on road and drainage maintenance and although it is specifically intended for technical officers and others engaged in road and drainage maintenance at.