Speeding up with mobile mapping

Author: Staff

Area 3 is Highways England’s second largest network carrying around 10 per cent of the country’s overall traffic flows. It includes the M27, M3, M4, A3, A303 and the Hindhead Tunnel and provides the main link routes between several major towns and cities including Oxford, London, Reading and Swindon in the north, and Bournemouth, Southampton and Portsmouth in the south.

The large area recently underwent an upgrade to design, replace and install road signage for clearer visibility across the gradients on the road. A topographical survey was needed to capture features for the design. The large scale project required detailed topographical surveys of the carriageway and verges, each survey measuring600 metres longcapturing:

• 车道范围
• 路标
• 碰撞障碍
• Channels
• Kerbs and kerb weirs
• Gullies
• Verge levels
• Ironwork frames
• 标志位置
• Traffic loops
• Overhead cables
• Electrical boxes
• Railings
• 栅栏
• 脚步
• Bridge soffit levels
• 码头位置

Sun Hill Surveying and Engineering Ltd., a specialist land surveying and engineering firm, was commissioned by Kier to survey 119 sites on behalf of Highways England Area 3.

从几个月开始

With more than 30 years’ experience focusing on the civil engineering sector throughout the United Kingdom, Sun Hill brought a modern approach to surveying the large project with itsLeica Pegasus:Twomobile mapping platform.

To survey these sites traditionally is a long and protracted operation using laser scanners, total stations and GPS, to collect thousands of points of data per day. Typically, this would take a surveyor around two days per site to complete in the field. Also, to survey this many sites would have required 119 individual traffic management installations.
With a project of this size, there is a significant health and safety risk associated to all involved, to personnel being both in the carriageway and in the verge during all times of the day and night. A safer and more cost effective method was found in the Pegasus:Two to deliver the project on time and in budget.

With mobile mapping, access to all sites was left clear with no road closures as the Pegasus:Two acts in the same way as any other public vehicle when collecting the 3D geospatial data. In total, the surveyors travelled超过6,000公里使用移动映射平台收集毫ons of points per second. There was没有对网络的干扰as traffic management was not required, allowing traffic flow to continue as normal.

Safety to survey personnel was also considerably improved using mobile mapping as no surveyors or traffic management crews were needed in the road as all data was captured from the safety of the vehicle. The surveyors were able to create traditional topographical surveys from point clouds.

“移动映射为我们提供了快速的数据捕获解决方案，”said Peter Bouchard, Sun Hill mobile mapping specialist."使用Pegasus：两个，我们节省了时间，减少了安全风险，并通过将六个以上的项目减少到12天，从而最大程度地提高了价值。”

Return on mobile mapping investment

As a result of using the Pegasus:Two, all 119 sites were surveyed inonly 12 days, with no traffic management, allowing processing and extraction to be undertaken from the safety of an office environment. Furthermore, all 119 sites were surveyed and delivered to Kiera week before the final deadline.

Sun Hill was able to deliver this projectwith less than 20 mm absolute accuracy. The surveys were then delivered in a staggered program, allowing sites to be prioritised and enabling some sites to be delivered earlier than others.

“在基尔，我们的目标是处于技术的最前沿，”Kier Roads Value Stream经理Chris Fuller说。"PEGASUS：两个是市场上最准确的移动映射单元之一。它有助于节省大量成本，并意味着我们可以从项目中完全消除交通管理，所有119项调查均在最终截止日期之前进行。”