Chennai: Motorists taking OMR near Thiruvanmiyur junction will have to face bottlenecks and navigate barricades for at least two more days, as repair work on the 6ft-deep cave-in is still underway. Metrowater officials said though they completed backfilling the crater with soil and debris, it will take two or three more days for material to consolidate. Only after that will highway engineers proceed with concrete grouting and final relaying. The crater formed after an ageing 2.2m-diameter prestressed cement concrete sewage pipe, laid two decades ago, gave way at a weak joint roughly 3m underground. A car fell into the crater on Saturday night, injuring five passengers. On Monday, TNRDC and Metrowater engineers conducted test runs to ensure the fixed sewage line could handle load. Sewage was pumped to all five pumping stations connected to the damaged main line, and engineers confirmed there were no further leaks. Meanwhile, Guindy Traffic Investigation Wing registered a case under section 125(b) of BNS for acts endangering human life or personal safety, and other applicable sections, based on preliminary findings.