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These gaps in the bridges are known as expansion joints. Expansion joints are basically gaps in the deck that allow the bridge to expand and contract. Without these gaps, the bridge may fall apart. ... These components expand with higher temperature and contract at lower temperatures.

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https://youtu.be/Hyaj7jnxCsM

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There are gaps as the pavements are always under the sun so it will expand and crack if there are no gaps

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Milk

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Remove, drain, and store hoses used outdoors. Close inside valves supplying outdoor hose bibs. Open the outside hose bibs to allow water to drain. Keep the outside valve open so that any water remaining in the pipe can expand without causing the pipe to break.
Velkan poh Seng

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They all expand and eventually crack the solution is to add cold water so it will contract

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This video is talking about how to prevent and deal with waterpipes

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How to Prevent and Deal with Burst Pipes

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The railway will bent as it expanded due to heat from the sun. To solve this, simply put gaps between railway so that when there is heat, it will expand and not crash other railway

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Excessive expansion on very hot days can cause the concrete to crack. Tiles on pavement may also pop out. To get around these problems,expansion gaps are laid between concrete slabs and tiles. These provide spaces for tiles and concrete slabs to expand without any damage.

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https://youtu.be/9JuKqkZVgTU

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As seen in this scientific documentary, the rails has a gap expansion. This is too avoid the rails breaking apart during hot weather and maintain its quality longer as well as improves safety for transport. Here’s a example

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湯瑪士跟著唱 - 湯瑪士小火車主題曲(中文版)

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The telephone wires and electricity cables are raised on poles and contract in cold weathers. They may become taut and even snap.Hence, the wires and cables are strung loosely from pole to pole.=)

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https://www.google.com.sg/url?sa=i&url=https%3A%2F%2Fwww.scientificamerican.com%2Farticle%2Fis-drinking-milk-unnatural%2F&psig=AOvVaw3SpgwJ--_3FXl2FNkqQkXh&ust=1615252831190000&source=images&cd=vfe&ved=0CAIQjRxqFwoTCMiiuvHDn-8CFQAAAAAdAAAAABAD

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The gaps are left for expansion of concrete due to change in temperature. The gaps are called expansion joints. These are good for concrete. If the expansion joints not provided concrete will develop cracks after some time.

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Water pipes and oil pipelines can expand on hot days causing them to burst . Hence expansion bends are made in these pipes. This allows the pipes to expand without any damage.

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Water and oil pipelines can expand on hot days , causing them to burst . Hence expansion bends are made in these pipes this allows the pipes to expand without any damage

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Railway tracks can bend and twist due to expansion in hot weather. Hence, expansion gaps in the railway tracks provide space for the tracks to expand without any damage on hot days.

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The boiling water is poured into a thick glass, the glass is likely to crack due to the uneven expansion of the glass.

Hence, most of the glassware found in the homes and in laboratory are made of a special type of glass. Unlike ordinary glass, glassware is less likely to crack when hot liquids are poured into it. this is because the glass expands very little when heated.

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Camouflaging in the dark

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Used the glass expands after inside then outside then Bao zha.
So to overcome this problem, laboratory glassware have manufactured the inner glass and the outer glass of the laboratory glassware with different thickness.The inner glass would be thicker and the outer glass would be thinner.This is manufactured this way so that outer layer glass would expand first and prevent cracking

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Damage of Thermal Expansion and Contraction to Rails

Rail expansion occurs when the temperature rises in summer, and the joints with proper length will be extruded and bulged due to rail expansion. If it is not serious, it will produce a bump, which will cause the train to run unsmoothly and send out an abnormal sound.The railroad track has vbeen a main cause for limiting the operating speeds of ... the railends, to allow for longitudinal thermal expansion of the rails on hot days. ... to determine the factors which have appreciable effects on the resistance of the  ...

Velkan and pohseng

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MRT and railway tracks have expansion gaps for it to expand when it gets heated from the sun

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These are two interesting questions. Water pipes burst because the water inside them expands is it gets close to freezing, and this causes an increase in pressure inside the pipe. When the pressure gets too high for the pipe to contain, it ruptures. Jonathan and kaisshenglee

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Since all the pipes in your home are full of water at any given time, thermal expansion creates pressure and stress that can cause damage or wear and tear. It all starts with your water heater. When water enters your home through the water main, some of it is directed into your water heater tank.

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Since all the pipes in your home are full of water at any given time, thermal expansion creates pressure and stress that can cause damage or wear and tear. It all starts with your water heater. When water enters your home through the water main, some of it is directed into your water heater tank.

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Velkan and pohseng

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railway tracks can bend and twist due to expansion in hot water . Hence ,expansion gaps in the railway tracks provide space for the tracks to expand with without any damage on hot water
~manting, vishan

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They are raised on poles contract in cold weather. They may become taut and even snap. Hence, the wires and cables are strung loosely from pole to pole.

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Telephone wire and electricity cables raised on poles contract in cold weathers . They may be come taut and even snap . Hence , the wires and cables are strung loosely from pole to pole .

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https://youtu.be/9JuKqkZVgTU

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Long bridges may expand a meter in hot weather hence these bridges need to be built with allowance for expansion bridges and meta girders on buildings have expansion gaps or a free and resting on rollers this allows  the metal structures to expand without any damAge on hot days

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The railway tracks has an expansion  gap to avoid cracks and over lapping