High-speed roads

Communities can also reduce noise by locating freeways far from residential neighborhoods, by reducing the speed on freeways and other high-speed roads, by requiring developers to plant trees and shrubbery as sound mufflers, and by requiring people to build houses and other structures with materials that help absorb sound. 

Current ACC designs are intended for use on freeways and other high-speed roads. Extension to urban traffic and to automatic traffic congestion following is desirable, and matter of actual development In addition to the basic ACC sensors, complicated additional sensors are required to completely recognize all objects and obstructions relevant to driving. To avoid misuse of the standard ACC, a minimum speed is defined. Below this speed (30-50 km/h is typical), the ACC control function is switched off, or at least limited to prevent positive acceleration. Fig. 7.7.7 shows the basic components of an ACC system. 

Mechanical cutting-grooving, also known as diamond grinding technique, is carried out by a specialised machine carrying diamond saw blades. It restores macro-texture and is more suitable in high-speed roads. 

Description Parking on or partially on a travel lane creates a hazard. This is especially true at night. On congested metropolitan streets, drivers expect to see parked vehicles in their lane and are usually ready to react and avoid them. On rural and high-speed roads, drivers do not expect to see vehicles parked in their lane. Their attention level may be lower and they may not be able to react quickly enough to avoid a collision. 

Direct access to high-speed roads can significantly increase accident... 

Eleven sites on high-speed roads treated with Diamond Grade road signs show a reduction in accidents in the after period. Six of the sites show a statistically significant reduction in accidents compared to control figures. Some of the signs utilised yellow... 

The speed of traffic and the road user involved will help to identify the outcome. For example, a location on a high-speed road where pedestrian accidents could occur is likely to result in fatal or serious injuries while a rear-end shimt accident on a low-speed road is likely to be damage-only. 

The Traffic Signs Manual (Chapter 8 The Traffic Safety Measures and Signs For Roadworks and Temporary Situations), Department for Transport Crossing high-speed roads on foot during temporary traffic management works. Construction Information Sheet No 53, 2000, HSE... 

High-Speed Roads. NCHRP Contractor Final Report on project 17-23. Transportation Research Board of the National Academies, Washington, DC. 

Another problem with many modem high-speed roads is that they relieve the driver of so much of the driving task that their monotony actually induces fatigue and tends to induce what some have labeled "highway hypnosis" - driving without awareness (DWA) that is due to a tendency to become drowsy and fall asleep. DWA is assumed to be caused by the very high... 

Larsson, T, N. Candappa, and B. Corben. Flexible barrier systems along high speed roads A life-saving opportunity. 2003, Monash University Accident Research Centre, Melbourne, Austraha. 

High Speed Roads - Traffic management and Safety Considerations. 

Maintenance and Improvement of High Speed Roads TrafGc Management and Safety Considerations. 

MAINTENANCE AND IMPROVEMENT OF HIGH SPEED ROADS - TRAFnC MANAGEMENT... 

Having identified many of the parties and operations involved, I would like to highlight the main reference documents which are used in the preparation of traffic management arrangements. It isn t intended that this list is exhaustive as there are a large number of other relevant Codes of Practice, advisory leaflets, reports and the like which are valuable sources of information. I wilt however concentrate on matters relating to high speed roads. 

TAL 2/03, Signal-control Junctions on High-speed Roads DfT, 2003... 

PPR035, Traffic Signal Controlled Pedestrian Crossings on High-speed Roads ... 

Figure 8.4 A bike route next to a high-speed road in British Colombia...

---