The train track is overdoing it a bit to my taste, so I'm contenting myself with just having some contemporary buildings, based on various sources.
The front cover of the town plan shows some buildings that
I've also built. Incidentally, the boy playing with the Esso truck is a young
Kjeld Kirk Kristiansen, the grandson of Lego Founder Ole Kirk Christiansen and
the man who was CEO and Chairman of the company until 2004 (his last name
starts with a K due to a clerical error when he was born apparently).
The back of the townplan shows other buildings, some of
which were available as sets at the time. I've built a few of those to go with
my townplan as well. The iconic Esso service station I initially built from
loose parts, but then I found a glued-together display model at a swapmeet,
made from all the correct parts including the special plates trimmed in red.
Its other disadvantage is that it can (and most often does)
warp over time, making larger bricks completely useless. The white flatbed
trailers made from cellulose acetate are very likely to be twisted into weird
shapes, and most Mercedes convertibles and moving trucks go somewhat
banana-shaped as well.
The Bedford trucks (and passenger cars) were issued in ABS
plastic before the Bedfords were replaced with Mercedes trucks. But for sheer
period nostalgia, the bright shine of cellulose acetate is hard to beat.