design speed

简明释义

设计速度

英英释义

例句

1.During the project, the team had to adjust the design speed 设计速度 due to changes in safety regulations.

在项目期间，团队不得不因安全法规的变化调整<设计速度>。

2.Engineers determined the design speed 设计速度 for the bridge based on traffic flow studies.

工程师根据交通流量研究确定了桥梁的<设计速度>。

3.The highway was constructed with a design speed 设计速度 of 120 km/h to ensure safe travel.

这条高速公路的<设计速度>为120公里每小时，以确保安全行驶。

4.The design speed 设计速度 for this railway line is set at 200 km/h to accommodate high-speed trains.

这条铁路的<设计速度>设定为200公里每小时，以适应高速列车。

5.The design speed 设计速度 of the tunnel was calculated to ensure minimal air resistance.

隧道的<设计速度>计算是为了确保最小的空气阻力。

作文

In the field of engineering and transportation, the term design speed refers to the maximum speed for which a road, railway, or other transportation infrastructure is constructed. It is a critical factor in the planning and design phases of transportation projects, as it influences not only the safety and efficiency of travel but also the overall cost and environmental impact of the construction. The concept of design speed is essential for engineers and planners to ensure that the infrastructure can accommodate the expected traffic volumes and types of vehicles while maintaining safety standards.When designing a highway, for instance, engineers must consider various factors that affect the design speed. These include the geometry of the road, such as its curvature and grade, as well as the surrounding environment, like urban development or natural obstacles. A higher design speed typically requires wider lanes, gentler curves, and better sight distances to ensure that drivers can navigate safely at higher velocities.Moreover, the design speed is not just a number; it reflects the intended use of the roadway. For example, a rural highway may have a higher design speed compared to an urban street, which needs to accommodate lower speeds due to pedestrian traffic and intersections. Therefore, understanding the context in which the infrastructure will be used is vital for setting an appropriate design speed.Additionally, safety is a paramount concern when determining the design speed. Studies have shown that higher speeds can lead to more severe accidents, prompting engineers to implement safety measures such as guardrails, signage, and better lighting. The design speed must be carefully balanced with these safety considerations to mitigate risks associated with high-speed travel.Another important aspect of design speed is its impact on traffic flow. Roads designed for higher speeds can facilitate faster travel times, which is advantageous for commuters and freight transport alike. However, if the design speed is set too high without adequate safety measures, it can result in an increase in accidents and congestion, ultimately negating the benefits of faster travel.Furthermore, environmental considerations are increasingly influencing the determination of design speed. Higher speeds often lead to increased emissions and fuel consumption, raising concerns about sustainability. As a result, many modern transportation projects are integrating eco-friendly practices and technologies, which may necessitate adjustments to the design speed to minimize environmental impact.In conclusion, the concept of design speed plays a vital role in the planning and implementation of transportation infrastructure. It encompasses various factors, including safety, traffic flow, and environmental impact, all of which must be carefully considered to create effective and sustainable transportation systems. As cities and populations continue to grow, the importance of understanding and applying the principles of design speed will only become more pronounced, ensuring that our roads and railways can meet the demands of the future efficiently and safely.

在工程和交通领域，术语设计速度指的是为道路、铁路或其他交通基础设施建设的最高速度。这是交通项目规划和设计阶段的一个关键因素，因为它不仅影响旅行的安全性和效率，还影响建设的总体成本和环境影响。设计速度的概念对于工程师和规划者至关重要，以确保基础设施能够容纳预期的交通量和车辆类型，同时保持安全标准。例如，在设计高速公路时，工程师必须考虑影响设计速度的各种因素。这些因素包括道路的几何形状，如曲率和坡度，以及周围环境，如城市发展或自然障碍。较高的设计速度通常需要更宽的车道、更温和的曲线和更好的视距，以确保驾驶员能够安全地以较高的速度行驶。此外，设计速度不仅仅是一个数字；它反映了道路的预期用途。例如，农村公路的设计速度可能比城市街道的设计速度高，因为城市街道需要适应由于行人交通和交叉口而导致的较低速度。因此，理解基础设施将使用的上下文对于设定适当的设计速度至关重要。此外，安全性是确定设计速度时的首要考虑因素。研究表明，较高的速度可能导致更严重的事故，这促使工程师实施安全措施，如护栏、标志和更好的照明。设计速度必须与这些安全考虑因素进行仔细平衡，以减轻与高速旅行相关的风险。设计速度的另一个重要方面是其对交通流量的影响。为较高速度设计的道路可以促进更快的旅行时间，这对通勤者和货运运输都是有利的。然而，如果设计速度设置得过高而没有足够的安全措施，可能会导致事故和拥堵的增加，最终抵消快速旅行的好处。此外，环境因素日益影响设计速度的确定。较高的速度通常会导致排放和燃料消耗的增加，引发对可持续性的担忧。因此，许多现代交通项目正在整合环保实践和技术，这可能需要调整设计速度以最小化环境影响。总之，设计速度的概念在交通基础设施的规划和实施中发挥着至关重要的作用。它涵盖了各种因素，包括安全性、交通流量和环境影响，所有这些都必须仔细考虑，以创建有效和可持续的交通系统。随着城市和人口的持续增长，理解和应用设计速度原则的重要性将变得更加明显，以确保我们的道路和铁路能够高效且安全地满足未来的需求。