▁the ▁public ▁transport ation ▁system ▁in ▁Den ver ▁is ▁much ▁more ▁complex ▁and ▁developed ▁than ▁other ▁parts ▁of ▁the ▁state , ▁tour ism ▁and ▁growth ▁have ▁led ▁to ▁extensive ▁needs ▁state wide . ▁ ▁Ro ads ▁and ▁high ways ▁ ▁Over view ▁Colorado ▁is ▁a ▁land locked ▁state , ▁so ▁ground ▁and ▁air ▁transport ation ▁are ▁the ▁primary ▁focus ▁of ▁the ▁state . ▁Also , ▁due ▁to ▁low ▁population ▁density ▁outside ▁the ▁Den ver ▁and ▁Colorado ▁Spr ings ▁metropol itan ▁areas , ▁high ways ▁are ▁the ▁primary ▁transport ation ▁method ▁for ▁the ▁majority ▁of ▁residents . ▁ ▁Inter state ▁and ▁U . S . ▁High ways ▁ ▁The ▁main ▁north – s outh ▁route ▁in ▁Colorado ▁is ▁Inter state ▁ 2 5 ▁( I - 2 5 ). ▁The ▁I - 2 5 ▁cor rid or ▁follows ▁the ▁front ▁range ▁of ▁the ▁Colorado ▁Rock ies ▁and ▁connect s ▁Den ver , ▁Colorado ▁Spr ings , ▁P ue blo , ▁Fort ▁Collins , ▁Gree ley , ▁Tr in idad , ▁and ▁other ▁small ▁cities . ▁I - 7 0 ▁cross es ▁Colorado ▁from ▁west ▁to ▁east ▁and ▁is ▁a ▁primary ▁vi ad uct ▁for ▁tour ists ▁and ▁loc als ▁to ▁visit ▁mountain ▁communities . ▁When ▁it ▁was ▁completed , ▁the ▁section ▁of ▁I - 7 0 ▁passing ▁through ▁Glen wood ▁C any on ▁was ▁the ▁most ▁expensive ▁section ▁of ▁Inter state ▁highway ▁ever ▁built ▁in ▁the ▁United ▁States ▁with ▁a ▁total ▁cost ▁of ▁$ 4 9 0 ▁million ▁for ▁the ▁ ▁stretch . ▁