New Delhi: The ban on the entry of heavy vehicles into Delhi by the Supreme Court-appointed EPCA to curb pollution was lifted on Tuesday — four days after it was imposed.

Trucks can now ply on the city’s roads between 11 pm and 6 am.

On Monday, the EPCA, fearing chaotic situation, allowed those vehicles that were stranded for the last four days at Delhi borders into the city.

The entry ban was imposed after the air quality of the national capital remained in the ‘sever’ category even two days after Diwali.

EPCA also requested owners of private diesel cars to refrain from using their vehicle for the next three days.

"We have already banned the entry of heavy vehicles in the city and are closely monitoring the situation and if the pollution shows an increasing trend then we will impose emergency measures," an EPCA member told PTI.

Delhi's air quality showed a slight improvement on Wednesday after overnight drizzles.
 
Twenty-eight areas in Delhi recorded "very poor" air quality while three areas recorded "poor' category", the data said.
 
Delhi's air quality has been oscillating between the "very poor" and "severe" categories after Diwali due to an increase in pollution because of bursting of firecrackers.
 
On Wednesday, the PM2.5 (particles in the air with a diameter of less than 2.5 micrometres) level was recorded at 202 while the PM10 (particles in the air with a diameter of less than 10 micrometres) was recorded at 327 in Delhi.
 
According to Indian Institute of Tropical Meteorology, the PM2.5 concentration will remain in very "poor category" on Wednesday.
 
"The air quality is likely to improve in the next two days, but remain in the very poor category in Delhi-NCR till Thursday. The impact of biomass burning in north west India is marginal over Delhi," it said.