by Rob | Feb 6, 2017 | Announcement, Lighting, RoadwayLighting, Traffic Signals
We are excited to announce that we have started work on the new North East False Creek Project! This project involves the removal of the Georgia Street Viaducts and the major works surrounding the site. Within the project limits, 5% of the City of Vancouver traffic signals will be impacted (42 plus or minus) and about 6 km of street lighting. The project also involves dynamic message signs, traffic management systems and communication duct design. We are looking forward to working with the City of Vancouver to help create a new and improved viaduct area. Stay tuned for updates on the progress of this...
by Rob | Oct 24, 2016 | Announcement, Lighting, RoadwayLighting, Standards, Traffic Signals
DMD have completed and issued the City of Vancouver street lighting and traffic signal design and construction standards which will be published by the City in early 2017. The standards define specific design and construction requirements for street lighting and traffic signals in the City of Vancouver. DMD and City staff worked in collaboration to develop these very detailed...
by Don McLean | Jun 25, 2016 | LED, RoadwayLighting
The American Medical Association (AMA) have provided information which has been carried on various news networks which raises some health concerns with the colour temperature of LED street lights http://www.cnn.com/2016/06/21/health/led-streetlights-ama/ The Illuminating Engineering Society and the Lighting Research Institute have responded as follows: http://www.ies.org/LDA/e-newsletter/2016/July/newswire/2016_07-led-ama.cfm In 2013 DMD undertook some research on the issue of colour temperature and potential health impacts of various colour temperatures of LED street lighting. The research should provide some clarity on the topic: Lighting and Health Memo This is a topic DMD have been studying for some time in order to provide clarity to our clients. Please feel free to call if you have any...
by wp-admin | Apr 1, 2016 | AdaptiveLighting, RoadwayLighting
For the purposes of evaluation DMD have LED street lights and an adaptive lighting control system installed on the roadway fronting their office. The City of Surrey’s lighting requirements for this local road with a low pedestrian activity is 0.3 cd/m². End of life light levels (at 20 years) with these LED’s are calculated to be 0.65 cd/m². Current light levels are more than twice the required levels at 0.74 cd/m². The adaptive controls allow lighting levels to be adjusted remotely via software and a computer. Earlier in the year DMD conducted a study where lighting was dimmed from full output (100%) down to 20% of full output in 10% intervals. A group of volunteers were assembled to review the visibility impacts of the dimming. The vast majority of those partaking in the study found no significant loss in visibility until the lighting was dimmed to 20% of the current output (80% reduction). To put this in perspective, after dimming to 20%, the light levels were only half of the required lighting level of 0.3 cd/m². The Virginia Tech Transportation Institute (VTTI) have conducted similar studies and found similar results at an 80% reduction of light output. These studies are significant in defining the range of allowable dimming for LED lighting systems. These results show great potential for dimming street lights leading to significant energy savings. DMD will continue to study and assess adaptive control systems which will lead to recommendations on the implementation of dimming street...
by wp-admin | Nov 20, 2015 | Announcement, RoadwayLighting, Traffic Signals
DMD, as part of the BA Blacktop design-build team, were awarded a 2015 Canadian Design-Build Institute (CDBI) Award of Excellence for the Roberts Bank Rail Corridor (RBRC) Combo Project. The RBRC Combo Project was an $88 million dollar design-build project delivered by the City of Surrey which included three new grade separated overpass structures spanning an active rail line and the high traffic volume Highway 10 corridor. The main goals of this project was to improve traffic safety, traffic flows and emergency vehicle access while reducing traffic delays and train whistles due to the at grade train crossings. DMD provided the Electrical Engineering for the project, which included 8 traffic signals, ITS ducting across all bridges, approximately 6km of roadway lighting along with some pathway lighting, all to meet the required Ministry of Transportation, City of Langley, Township of Langley and City of Surrey...
by wp-admin | Oct 19, 2015 | Announcement, RoadwayLighting
The project involved the conversion of over 22,000 Street Lights in Windsor Ontario. DMD developed a product selection specification that rated and reviewed products from major suppliers in a point score based system. We performed lighting calculations in order to define the appropriate luminaires to meet lighting level and maximize efficiency. The conversion is expected to provide higher than expected energy savings due to our extensive review and assessment...
