The line block for the ongoing track doubling work in the Kayamkulam-Mavelikara stretch will be for seven hours from 11 a.m. on Thursday. According to the Railways, the regulation of train services already announced is likely to be extended on account of the increase of the line block from four hours to seven hours. Hence, the train services to and from Ernakulam are likely to be delayed by two to three hours on March 10. — Staff Reporter