▁The ▁significance ▁of ▁the ▁connection ▁for ▁the ▁local ▁community ▁was ▁comm emor ated ▁by ▁a ▁monument ▁ere cted ▁in ▁ 2 0 0 6 , ▁featuring ▁tram ▁whe els ▁on ▁a ▁surv iving ▁section ▁of ▁the ▁historical ▁rails . ▁The ▁population ▁reached ▁ 6 0 0 0 ▁by ▁ 1 9 6 1 . ▁ ▁In ▁the ▁ 1 9 6 0 s ▁a ▁decision ▁was ▁made ▁to ▁construct ▁a ▁large ▁housing ▁estate ▁of ▁concrete ▁panel ▁buildings ▁in ▁Ret kin ia . ▁Const ruction ▁work ▁began ▁in ▁ 1 9 7 1 . ▁According ▁to ▁initial ▁plans , ▁it ▁was ▁to ▁accommod ate ▁as ▁many ▁as ▁ 1 2 0 , 0 0 0 ▁people , ▁but ▁the ▁area ▁south ▁of ▁the ▁railway ▁tracks ▁was ▁eventually ▁designated ▁for ▁single - family ▁houses ▁that ▁were ▁to ▁form ▁a ▁separate ▁estate , ▁bringing ▁the ▁total ▁en vis aged ▁number ▁of ▁residents ▁in ▁Ret kin ia ▁down ▁to ▁c . ▁ 7 0 - 8 0 , 0 0 0 . ▁The ▁estate ▁was ▁originally ▁designed ▁with ▁an ▁ade qu ate ▁number ▁of ▁green ▁spaces , ▁sh ops ▁and ▁other ▁services , ▁but ▁public ▁pressure ▁and ▁the ▁demand ▁for ▁living ▁qu arters ▁led ▁to ▁stream lin ing ▁the ▁construction ▁effort ▁to ▁focus ▁on ▁blocks ▁of ▁fl ats ▁only , ▁resulting ▁in ▁a ▁three - shift ▁school ▁system ▁due ▁to ▁a ▁short age ▁of ▁school ▁buildings ▁couple d ▁with ▁a ▁period ▁of ▁baby ▁bo om , ▁and ▁forcing ▁many ▁local ▁residents ▁to ▁do ▁their ▁sho pping ▁in