With some prompting from a customer – Anthony Perillo – I created some O scale (1:48) Jersey Barriers – a 10′(3m) and a 20′ (6m) version. According to Wikipedia ..
A Jersey barrier, or Jersey wall, is a modular concrete or plastic barrier employed to separate lanes of traffic. It is designed to minimize vehicle damage in cases of incidental contact while still preventing vehicle crossovers resulting in a likely head-on collision.
I was pretty happy with how well they printed
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Jersey Barriers
$0.68 – $2.84 Select options
I also printed both the 10′ and 20′ models in HO scale and was quite surprised at how well they came out even using a .4mm nozzle. I am sorely tempted to switch over to the .25mm nozzle and print a bunch in HO as stock.