( These ( ( are ( ( ( private ( access roads ) ) ( -LRB- ( ( mostly ( from ( large ranches ) ) ) -RRB- ) ) ) ( which ( occur ( over ( ( a ( limited stretch ) ) ( in ( western Texas ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT These)) (VP (VBP are) (NP (NP (JJ private) (NN access) (NNS roads)) (PRN (-LRB- -LRB-) (PP (RB mostly) (IN from) (NP (JJ large) (NNS ranches))) (-RRB- -RRB-)) (SBAR (WHNP (WDT which)) (S (VP (VBP occur) (PP (IN over) (NP (NP (DT a) (JJ limited) (NN stretch)) (PP (IN in) (NP (JJ western) (NNP Texas)))))))))) (. .)))
These are private access roads (mostly from large ranches) which occur over a limited stretch in western Texas.
(ROOT (S (S (VP (VBG Limiting) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NP (NNS cars)) (PP (IN on) (NP (DT the) (NNS roads)))))))) (VP (MD would) (ADVP (RBS most) (RB likely)) (VP (VB improve) (NP (DT the) (NN air) (NN quality)) (PP (IN in) (NP (JJ large) (NNS texas) (NNS cities))))) (. .)))