Yea, it defently look like that. The right hand bridges look like then have 40 meter span (that is quite far span, but totally realistic). The left bridge look like it have a 75 meter span, that is… well possible, not economical realistic. (for example the Oresund link bridge have a huge 250 meter span, but its over water and really high).
It seems that the game have something like 15 meter span, that is just plain non realistic. The pillars will be quite a bit more expensive then the actual brige. The only reason to make a so short brige is if it have to be really thin or if it pases over a very narow object (a contry road for example)
0-15 meter – concretion beem brige
15-30 meter – concretion box bridge
30-100 meter – gridsteal bridge (as in image)
100- cable stay bridges…
contrary to popular belief there exist no suspension rail bridges, a myth that hollywood spreads.
And that is of course for modern bridges… i would say from about 1960 and forward. For bridges from the 1800 i´m not sure (I am a construction engineer, not a historian) But i can guess.
0-15 meter wood bridge
15-30 meter, gridiron bridge.
30-50 meter, grid steel bridge
steel was really expensive up to around 1890, then when production increased steel become almost as cheep as iron quite quickly. Around 1910 or so steel was so cheep that it was basically no point in using iron for anything else than cast. Also before like 1960-1970 something iron was realtivly expensive in high volumes to, so thats why most old bridges are in wood.
Also, steel track was not really that common during the mid 1800-reds, they just become common in the late 1890 (o nooo.. back to the future lied to us).
The majority of the British rail track was actually built with iron track, not steel. It was later just in the end of the century switched to steel track. For example great western railroad where they switched to standard gauge and steel track.