Now imagine this: You are at a pedestrian crossing. You are waiting for the green light to cross the street.
As soon as the light turns green, you step down from a height difference of just a few centimeters without even noticing it. If you have a stroller with you, you instinctively lift its front wheels slightly.
You do not do this consciously. But you know there is a change in level there.

This is exactly what I want to talk about:
Are these small differences in grade really necessary in public spaces?

At this point, let us take a look at the effects that changes in level have on us as users.

What Is a Change in Grade, and Why Is It Created?

A change in grade refers to the height difference of one surface in relation to another. Sometimes it appears as a barely noticeable variation, and at other times as a step that directly affects movement. While walking during the day, stepping down from a sidewalk, or moving from one area to another, we actually encounter this difference constantly. In general, it is not accidental; it is created in response to certain needs. It directly affects how a space is perceived, how it is used, and even how people move within it. From a design perspective, levels give depth to a place. A single-level area often creates a monotonous perception, while the use of different levels together offers the user a sense of discovery. People experience space not only by seeing it, but by moving through it. For example, a rise of just a few steps can separate a seating area from a walking axis while also giving the space a natural rhythm. Boundaries that are not felt on a flat surface begin to form almost by themselves through level play.

However, when these necessities are not interpreted correctly, they can create outcomes that negatively affect the user experience.

The main reasons for creating changes in grade in spaces can be summarized as follows:

• Drainage and Water Management: I think this is one of the most invisible benefits of level differences in our daily lives. Grade changes are created to prevent water accumulation and to direct water movement. If they are not resolved correctly, however, this situation can reverse itself and lead to puddles and surface deterioration.
• Separation of Circulation: Today, we frequently encounter the concept of level difference in separating pedestrian, vehicle, and bicycle routes. However, because such differences can create barriers in terms of accessibility, we will discuss in the following sections how these changes are increasingly being eliminated in new design approaches.
• Safety and Boundary Definition: In dense urban areas, this method is often used as a control mechanism. It helps make different use areas more legible and guides the user through the space.
• Separating Spaces from One Another: We use changes in grade to define spaces and boundaries belonging to different use scenarios. Step differences created between seating areas and green spaces, or between circulation routes and green areas, can be given as examples. However, defining such separation through sharp level differences may create problems in terms of accessibility and continuity, especially in public spaces. In current design approaches, these kinds of distinctions have begun to be defined through material changes or surface language rather than changes in grade. We will examine this issue in more detail in the following sections.

What Has Modern Design Changed?

In the traditional design approach we are familiar with, spaces serving different uses were separated from one another by sharp boundaries. Sidewalks, curbs, and visible grade changes were seen as the most basic ways of defining space.

Over time, however, this approach began to be questioned in terms of user experience. Accessibility, in particular, became an issue concerning everyone in public spaces, from people with disabilities and users with strollers to children aged three or four and people over the age of sixty-five.

The emergence of all these issues created the need for a new design approach. Differences between surfaces were softened and made more fluid, reducing changes in grade to a minimum. In this way, the main aim became to guide user movement without interrupting its flow.

In this newly shaped approach, the goal is not to restrict the user, but to create a natural flow within the space.

Minimizing grade differences in this way does not mean leaving the space undefined. On the contrary, it increases the importance of details such as texture and color in material selection. In this changing design language, these details now enter our lives as tools of navigation.

In more traditional designs, hardscape materials were often handled in a visual and commercial manner. In the new approach, however, aesthetic perception gains importance, and the harmony between materials becomes more central. The perception of the space as a whole has led to the emergence of new strategies.

This design evolution is not only a technical solution; it also brings an ethical stance into the present day. The ability of a wheelchair user and an athlete to move on the same plane with the same level of comfort increases the inclusive power of public space. The success of design at this point lies in removing physical barriers while also making social barriers invisible.

The point where aesthetics meets function, and function meets social justice, is, I must say with pride, a real victory of modern landscape architecture.

The Blending of Surfaces

The disappearance of sharp boundaries allows space to break free from its rigid form and take on a more flexible identity. In traditional design, an area defined only as a passageway can, in a modern approach, become a meeting point, an exhibition area, or a resting corner through the blending of surfaces. The disappearance of boundaries can also be understood as the user redefining the space according to their own initiative or needs. In this respect, modern design does not draw strict limits around the function of a space; instead, it opens a field of experience for it.

The physical boundaries and curbs we are used to seeing in daily life have a guiding effect on users, telling them where to stop, where to pass, or how to move. In the spatial logic developed by modern design, however, users enter a more intuitive process of wayfinding. This turns movement into a strategy in which the user draws their own route.

When design begins to manage possibilities instead of drawing boundaries, landscape becomes not just a place to look at, but a process to be lived.

The most concrete and functional expression of the principle of blending surfaces is the meeting of bicycle paths and pedestrian axes on a single flush surface. The high sidewalks and curbstones that sharply separate these routes in traditional urban planning are giving way, in modern landscape design, to a smooth continuity.

In this approach, the distinction between bicycle paths and pedestrian routes is defined not by a physical barrier, but by the character of the material itself. By material character, we can understand differences such as color, texture, size, and joint pattern.

These clean surfaces, where people do not encounter any step or noticeable slope difference while crossing from one side to another, minimize visual clutter in spaces while also highlighting the clarity of the design.

This design language developed on a single plane does not divide the space into fragments; instead, it brings all parts together on a common ground.

The result is a holistic landscape in which design is freed from unnecessary complexity and movement continues in flow without interruption.

Examples of Modern Landscape Approaches from Around the World

1- Road Design Examples from Budapest and Prague

These are photographs I took in Budapest and Prague. Although the roads in question serve both vehicle and pedestrian circulation, they are separated without creating any change in grade, through differences in paving and various guiding elements. Stormwater management is provided through slopes that are almost imperceptible on the surface, preventing water from accumulating above ground.

2- Queens Plaza North, Long Island City, New York

This image shows the Queens Plaza North (Dutch Kills Green) project, a modern and functional example of urban landscape architecture. Planned in 2003 by a team led by Margie Ruddick, the project aimed to resolve complex infrastructure on a single, step-free ground plane for pedestrians and cyclists, transforming it into a corridor that also includes greenery. As can be seen in the photograph, everything is accessible and barrier-free.

The large slabs used in pedestrian paths and resting areas were designed with permeable concrete and stone materials that allow rainwater to move into the ground. Asphalt was preferred for the bicycle paths, while bicycle icons and pedestrian crossing lines were marked in white paint. We can say that the design clarifies visual guidance by creating a strong contrast.

The plants resembling Carex on the right side of the bicycle path, moving with the wind, can also be interpreted from the photograph as adding dynamism to the concrete texture.

3- Street and Road Designs in Hoogeveen, the Netherlands

The unusual and creative sidewalk design in the image is part of the Netherlands’ urban planning approach, especially the concept of the “woonerf” or “living street.” These designs, which are quite common in the Netherlands, transform the identity of the street through geometric shapes and contrasting colors, unlike conventional paving. At the same time, from a sustainability perspective, bricks made from 100% natural clay are used, and products resistant to wear and color fading are preferred.

4- Bancroft Way, Berkeley, California

Designed by Peter Walker and Partners, this project carries highly characteristic qualities in terms of detail resolution, especially for us as landscape architects. The joints between concrete slabs were strategically designed for stormwater management. Channels filled with river stones were used as an aesthetic drainage solution that allows water to filter down into the lower layer. This project can be considered a successful example of how aesthetics and technique, such as water management and durability, can be brought together, especially for university campuses or plazas with intense pedestrian circulation.

Every day, you walk along the same route. You step on the same pavement and pass by the same trees.

But have you ever stopped to think?

Is the ground beneath your feet really just a standard path, or is it a space that contains many layers of design?

For most people, landscape means a few trees, a bit of lawn, perhaps a park. In reality, however, landscape involves a systematic infrastructure, a planned technical order, and a multi-layered design logic. In this article, I want to explain this through photographs I took from my own professional experience.

The path you walk on guides you without you realizing it. It draws your attention to certain points.

In fact, with details you often do not even notice, it manages water and prevents it from accumulating on the surface of the paths you walk on. That is why landscape does not only design space, but also human behavior. It slows you down, speeds you up, or makes you stop. Sometimes it makes you sit under a tree, sometimes it leaves you feeling alone in a wide open space, and sometimes it makes you lift your head and look around through striking elements.

Throughout the years I worked in the field, the clearest thing I observed was this:

In a well-designed landscape, people do not adapt themselves to the design. The design guides people naturally, within an intuitive flow. While people move forward without thinking about where they step, they are actually moving within a scenario drawn by design. The most successful projects are those in which people do not conflict with space; rather, the space intuitively reads human behavior and makes it easier.

How Do the Paths We Walk On Actually Work?

In daily life, when we look at a pedestrian path, we usually see only the surface:
A granite stone, a neat paving pattern, and clean joint lines… Yet this surface is only the visible part of a multi-layered system.

Take a granite-covered pedestrian path, for example. At first, we design the granite paving for that path. The stone covering we see on the surface provides aesthetics and durability. Yet the real elements that determine the performance of this surface are the layers underneath it.

A typical system can be constructed as follows; we can show it with an example sequence:

• Granite paving stone
• Bedding layer (sand or fine aggregate)
• Base course (stabilized material)
• Compacted subgrade

Water Management: The Invisible Design

In this system, one of the details that is often overlooked yet plays a critical role is water management. One of the tools we can mention in water management is the joint. The joint allows the surface to function, balances stress, and helps water move in a controlled way.

One of the most common problems encountered on site is the omission or faulty application of one of the layers. Most of the time, the problem appears on the surface; the stone becomes loose, breaks, or collapses. But the real problem is usually underneath.

The condition seen in the photograph occurs when the soil layer beneath the finished stone paving shifts due to the effect of water; this ground movement then causes the paving above to deteriorate as well.

Landscape elements are not only aesthetic objects, but also performance-based ones. The performance of a pedestrian path is measured by its load-bearing capacity, water permeability, resistance to freeze-thaw cycles, and deformation behavior over time.

Invisible Systems

Just as with hardscape, planting design is not limited to the visible surface. The health and sustainability of a green area are directly related not only to plant selection, but also to the system constructed beneath it. In planting applications, just as in hardscape systems, there is a layered structure.

One of the situations I most frequently observed on site is irregular plant growth occurring in different parts of the same project. At first glance, this may look like a design flaw, but in most cases the problem stems from drainage elevations, compacted soil, or faulty irrigation zoning. In other words, the problem lies not in aesthetics, but in the invisible layers of the system.

For a healthy planted area:

• Suitable soil mixture (a balance of organic and mineral content)
• Drainage layer (for the removal of excess water)
• Irrigation infrastructure
• Appropriate volume and depth for root development
• and many other technical criteria must be evaluated together.

Especially in tree applications, the root zone is a critical issue. A compacted ground that cannot breathe or has limited access to water directly affects plant development. For this reason, in a properly designed landscape, not only the visible upper form of the plant but also the invisible space necessary for root development is planned.

One of the common problems encountered on site is that this infrastructure is not adequately taken into account. Plants that initially appear healthy may fail to develop over time or begin to show signs of decline.

The structure of the soil, how much water it retains or how quickly it drains away, how far the roots are able to spread… all of these directly affect how the plant will appear above ground. That is why sometimes, in the same area, one patch of grass can look healthy while another beside it dries out. Or a newly planted tree may look fine at first but gradually weaken over time.

What Could Be the Possible Causes?

• Drainage problem: Water accumulating in some areas while remaining insufficient in others negatively affects root development. Patchy drying patterns like the ones seen in the photograph are usually signs of non-uniform drainage.

• Soil compaction: Especially in areas with heavy pedestrian traffic, the soil becomes compacted over time. This prevents the roots from receiving air and makes it harder for water to infiltrate the soil.

• Irregular irrigation system performance: Due to sprinkler placement or pressure differences, some areas may not receive enough water while others may receive too much.

• Sub-layer problems: An inadequate or poorly designed base layer prevents water from being distributed properly. This then appears on the surface as irregular drying or weak growth.

The same situation can also be observed in trees. The general drying seen in the tree in the photograph is usually caused not by a single factor, but by a combination of planting errors, root zone problems, and deficiencies in water management.

• Insufficient root zone volume or compacted soil: If roots cannot find enough space to develop, the tree quickly enters stress.

• Lack of drainage or water accumulation: If tree roots remain constantly in water, they become deprived of oxygen and begin to rot.

• Wrong species selection or adaptation problem: If the plant is not suitable for the climate and soil in which it is placed, its development is directly affected.

• Irrigation errors: Insufficient or irregular irrigation is a critical problem, especially for newly planted trees.

In many cases, this situation originates not from the plant itself, but from the system constructed beneath it.

That is why reading landscape only as the visible green surface or the hard ground is an incomplete approach. Beneath every step lies engineering, beneath every surface lies a system, and behind every plant lies an ecological balance.
The ground you step on is actually the result of a design you hardly notice.

So do not dismiss the places you step on as simply “landscape.” Because if there is a properly designed infrastructure beneath that surface, then the quality you see above is not a coincidence.