Minutes south of Interstate 10 and Sealy, the pastures along FM 1458 are their own silent world in the morning. Mists lift to reveal black cattle, brown and spotted horses, snow-white egrets underfoot in lush green grass. Then a concrete mixer comes churning down the blacktop. Just up the road is a small subdivision. More are sure to come as city dwellers, including weekenders and retirees, move out in search of a quieter, simpler life — and relief from city traffic. Although the gradual influx may bring greater changes in the long run, what disturbs residents most is the planned...