Bodies of water would either be crossed on ferryboats or if shallow enough by fording them (i.e. wading across).
In the case of crossing roads and railroad tracks everything would be at level crossings, where both crossed at a ground level intersection.
Without bridges there would also be no aqueducts to carry water, so this would be done with surface canals (which would have to be crossed by ferryboats).
There are many situations where these would be very dangerous.
they would use a boat or just do not go across town
Without bridges, transportation would be severely hindered, making it difficult to cross rivers, valleys, and other obstacles. This would lead to longer travel times, increased traffic congestion, and higher transportation costs. Emergency services would also struggle to reach those in need, impacting public safety. Additionally, economic activities would suffer due to limited access to resources and markets.
Without bridges you wouldn't be able to get over rivers or canyons, otherwise we would have to use ferries all the time.
people being less lazy-we would swim across
There were several reasons that bridges and tunnels were important to railroads. The main reason was that without them, trains would not have been able to travel through mountains.
For 15 years ruby bridges was a travel agent but became a full time mother
they could go on the seas and travel that way
The river Thames bisects London in an east west direction. Without the bridges it would have to be two separate cities with no way of driving or walking between them.
To cross obstacles that would otherwise be impassible and in doing so improve transportation links by decreasing travel distances.
There are different types of bridges. There are bridges that have been built to ease traffic congestion in large cities; bridges have been built across rivers and the ocean to allow cars and trucks to travel from one place to another; bridges have been built to allow pedestrians to pass over highways safely. Bridges link places, so people are able to travel with ease between places. Goods can be carried on bridges and therefore trade is made possible.
Philippa Beatrice Bridges has written: 'A walk-about in Australia' -- subject(s): Description and travel
It is possible to travel into space without a space suit, but if the capsule lost pressure, the astronauts blood would boil and they would be dead in about a minute.