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<br />. - <br /> <br /> <br />Pagt <br />- <br /> <br />From: <br />To: <br />Date: <br />Subject: <br /> <br />"Borchardt, Darrell" <d-borchardt@tamu.edu> <br />"'sbeard@dot.state.tx.us'" <sbeard@dot.state.lx.us> <br />3/8/027:48AM <br />FW: SH 225 Potential Truck Lane Restriction <br /> <br />> --Original Message- <br />> From: Borchardt, Darrell <br />> Sent: Thursday, January 31,20027:04 AM <br />> To: Wegmann, Sally' <br />> Subject: SH 225 Potential Truck Lane Restriction <br />> <br />> I have looked at the subject question and am providing the following <br />> recommendations. Let me know if you need further <br />> information. <br />> <br />> General Criteria <br />> <br />> The SH 225 La Porte Freeway does meet the general criteria of geometries <br />> (six lane cross section of through lanes throughout Its length) and <br />> overall truck percentages of at least 4%. Studies completed by ITI in <br />> 2000 indicate an average truck percentage of 6% throughout the day; <br />> percentages of 12-15% were observed during the midday time period. <br />> . <br />> Limits of Truck Restriction <br />> <br />> The limits of the truck restriction should extend from Allen-Genoa (about <br />> 1-mlle east of 1-610 East Loop) to Sens Road (about 1-mile-west of SH <br />> 146). This approximate 12-mile section of SH 225 passes through the <br />> cities of Houston, Pasadena, Deer Park, and laPorte. The 1-mile spacing <br />> on the extremities allows ample time for the truck traffic to merge out <br />> of/into the Inside lane as may be required to exit at the 1-610 and SH 146 <br />> interchanges. The freeway consists of a general 6-lane cross-section. <br />> The section between the Sam Houston Tollway and Miller Cut Off Road access <br />> ramps includes a 4-th lane. The lane Is not a throuah lan" but operates <br />> as an unusually long auxiliary lane to facilitate merging and diverging <br />> movements in this section of freeWay. <br />> <br />> Proposed Operating Hours <br />> <br />> The law only provides for the restriction of trucks during .peak hours.. <br />> After a review of traffic volume data along the freeway es well as the <br />> access ramps, It has been determined that the peak hours for this facility <br />> are from 6:00 am to 8:00 pm. Traffic volume increases during the 6:00 am <br />> hour and begins to decrease significantly during the 7:00 pm hour. <br />> Therefore it is recommended that the truck lane restriction be in effect <br />> from 6:00 am till 8:00 pm. <br />> <br />> <br />> <br />> Darrell W. Borchardt, P.E. <br />> Research Engineer/Co-Office Manager <br />> Texas Transportation Institute <br />