Rtageometric: Design Manual For Dubai Roads2017 Pdf New

The Geometric Design Manual for Dubai Roads, referencing AASHTO standards and local practices, acts as the primary technical guide for road planning, design, and construction. It defines critical parameters, including road hierarchy, lane widths of 3 to 3.75 meters, and specific sight distance requirements. Access the Geometric Design Manual For Dubai for comprehensive details. Dubai Municipality Road Specification - MCHIP

2. Key Content Areas (typical for such a manual)

| Section | Topics Covered | |---------|----------------| | Design Controls | Design speed, design vehicle, traffic volume thresholds, level of service (LOS) | | Cross-Section Elements | Lane widths (e.g., 3.65 m for arterial roads), shoulder widths, median types, kerb heights, footpaths, cycle tracks | | Horizontal Alignment | Minimum radii, superelevation rates, transition curves (clothoids) | | Vertical Alignment | Maximum grades, minimum K-values for crest/vertical curves, stopping sight distance (SSD) | | Intersections | At-grade (signalized/un signalized) design, turning radii, channelization, roundabout geometry | | Interchanges | Ramp design speeds, acceleration/deceleration lane lengths, weaving sections | | Grade Separations & Underpasses | Vertical clearance (minimum 5.1 m for highways), sight distance at underpasses | | Pedestrian & Cyclist Facilities | Minimum footpath width (2.0 m in urban areas), cycle lane dimensions (1.5–2.0 m) | | Bus & Transit Facilities | Bus bay geometry, lay-by dimensions | | Drainage Integration | Longitudinal grades for surface drainage, gully placement | | Traffic Calming | Speed hump profiles, chokers, raised crossings | rtageometric design manual for dubai roads2017 pdf new

Introduction

3. Comparison with International Standards

• AASHTO (Green Book): Adapted for Dubai’s urban context (higher design speeds on arterials, wider lanes in industrial zones).
• UK’s DMRB: Influences roundabout design and sight distance requirements.
• UAE unified standards: Complies with national road regulations but adds Dubai-specific local access requirements.

4. Core Geometric Elements

A. Road Classification

The manual categorizes roads into distinct hierarchies, determining their geometric features: The Geometric Design Manual for Dubai Roads, referencing

Future Proofing: Provision for autonomous vehicle lanes and smart sensor placement. Impact on Urban Living AASHTO (Green Book): Adapted for Dubai’s urban context

1. Road classification: The manual provides a classification system for roads in Dubai, which includes highways, freeways, major roads, and local roads.
2. Design speed: The manual specifies design speeds for different types of roads, which are used to determine various design elements, such as curve radii, superelevation, and stopping sight distance.
3. Lane widths and numbers: The manual provides guidelines for lane widths and numbers, taking into account factors such as traffic volume, speed, and road classification.
4. Horizontal and vertical alignment: The manual provides guidelines for designing horizontal and vertical alignments, including curve radii, superelevation, and gradient.
5. Intersections and interchanges: The manual provides guidelines for designing intersections and interchanges, including sight distance, merging and diverging tapers, and traffic signal design.
6. Pedestrian and cyclist facilities: The manual provides guidelines for designing pedestrian and cyclist facilities, including sidewalks, crosswalks, and bike lanes.